MAAS-MI Review of Systems

1UNIVERSAL CONDITIONS

2--Fever & Chills

• 2.1Complaint Heuristic

  1. Asks about the nature of fever and chills
     • “Describe the fever. What does it feel like?”
     • Nature:
       • Feeling of warmth, heat, or burning
       • Chills–shivering, shaking, feeling cold despite warmth
       • Rigors–intense shaking, teeth chattering
       • Sweating–profuse sweating, night sweats, drenching
       • Intermittent vs. continuous sensation of heat
     • Pattern:
       • Continuous warmth throughout
       • Hot flashes–sudden waves of heat
       • Alternating–feeling hot, then cold, then hot again
       • Chills preceding fever spike
  2. Asks about the intensity of fever and chills
     • “How high has the temperature been? How are the chills affecting you?”
     • Functional impact:
       • Mild–uncomfortable but can function normally
       • Moderate–difficulty with usual activities, reduced productivity
       • Severe–bedridden, unable to care for self
     • Severity of chills (behavioral):
       • Mild–feeling chilly, goosebumps
       • Moderate–shivering, need extra blankets
       • Severe–rigors (uncontrollable shaking), teeth chattering
     • Temperature classification:
       • Low-grade–37.3-38.0°C (99.1-100.4°F)
       • Fever–38.0-39.0°C (100.4-102.2°F)
       • High fever–39.0-40.0°C (102.2-104°F)
       • Very high fever–>40°C (>104°F)†
  3. Asks about localization–fever distribution
     • “Is the heat all over your body or more prominent in specific areas?”
     • Distribution:
       • Localized–specific area feels particularly hot:
         • Leg/extremity (cellulitis, DVT)
         • Joint (septic arthritis)
         • Abdomen (intra-abdominal infection)
         • Face/head (sinusitis, dental abscess)
         • Back/flank (pyelonephritis)
       • Generalized–whole body feels hot (systemic infection, inflammatory conditions)
     • Depth:
       • External–flushed skin, hot to touch, visible redness
       • Internal–deep sensation of heat, “burning from inside”
       • Both–generalized systemic fever
  4. Asks about shifts and radiation–movement patterns
     • “Has the fever or warmth moved or spread anywhere?”
     • Migration patterns (temporal):
       • Started in one specific area, spread to whole body (progression over time)
       • Chills at onset, followed by fever (temporal sequence)
       • Chills recurring with each fever spike (cyclic pattern)
       • Chills disappearing as fever persists (evolution)
     • Radiation patterns (spatial):
       • Migrating warmth from one area to another (spreading pattern)
       • New areas of localized heat developing (spreading infection)
       • Started generalized, became more localized (may indicate abscess formation)

• 2.2Time-Intensity Heuristic

  1. Asks about onset–when fever started
     • “When did the fever start?”
     • Timing:
       • Specific timeframe–hours, days, weeks ago
       • Sudden/abrupt onset–within minutes to hours (pneumonia, meningitis, sepsis)
       • Gradual onset–over days (viral infections, tuberculosis, endocarditis)
  2. Asks about course over time–evolution since onset
     • “Has the fever been getting better, worse, or staying the same?”
     • Duration:
       • Acute–<7 days (most viral/bacterial infections)
       • Subacute–7-14 days (atypical infections, early TB)
       • Chronic/persistent–>14 days (TB, endocarditis, malignancy, autoimmune)
       • Fever of Unknown Origin (FUO)–>3 weeks†
     • Progression:
       • Improving–fever decreasing, fewer spikes (resolving infection, effective treatment)
       • Stable–same pattern, same height (chronic infection, controlled inflammation)
       • Worsening–higher temperatures, more frequent (spreading infection, treatment failure)
  3. Asks about course during day–pattern over 24 hours
     • “Does the fever follow a pattern during the day?”
     • Daily fever patterns:
       • Continuous–constant elevation all day (pneumonia, typhoid)
       • Intermittent–fever alternates with normal temperature periods (malaria, abscess)
       • Remittent–temperature fluctuates >1°C daily but stays elevated (most bacterial infections)
       • Relapsing–days of fever, then days fever-free, repeating (Borrelia, lymphoma, Hodgkin’s)
       • Diurnal variation–lowest in early morning (4-6 AM), highest in evening (4-8 PM)–normal pattern
  4. Asks about frequency–recurrence pattern
     • “Have you had similar fever episodes before?”
     • Pattern:
       • First episode
       • Recurrent infections–UTIs, sinusitis, pneumonia (immune deficiency consideration)
       • Periodic fever syndromes–FMF, TRAPS, PFAPA

• 2.3Triggering & Modifying Factors Heuristic

  1. Asks about triggering factors–what initiated the fever
     • “Did anything seem to trigger the fever?”
     • Infectious exposures:
       • Travel (past 4 weeks)–tropical/endemic areas (malaria, dengue, typhoid)
       • Sick contacts–household, work, school (viral infections, COVID-19, influenza)
       • Animal/tick exposure–farm animals, pets, wild animals (Lyme disease, brucellosis, Q fever)
       • Crowded living–dormitories, shelters, prisons
     • Environmental/occupational exposures:
       • Healthcare work–TB exposure, bloodborne pathogen risk
       • Agriculture/veterinary–zoonotic diseases
       • Construction/excavation–fungal exposures (histoplasmosis)
       • Heat exposure–prolonged sun exposure (heat exhaustion, heat stroke)
     • Medical procedures:
       • Recent surgeries (past month)–post-operative infection
       • Dental procedures–endocarditis risk
       • Invasive procedures–endoscopy, catheterization, biopsies
     • Medications:
       • New medications (drug fever typically starts 7-10 days after initiation)
       • Antibiotics–beta-lactams, sulfonamides
       • Anticonvulsants–phenytoin, carbamazepine
       • Recent immunizations–transient fever normal 24-48 hours post-vaccine
     • Food/water exposures:
       • Undercooked food–Salmonella, E. coli
       • Untreated water–Giardia, cryptosporidium
       • Unpasteurized dairy–brucellosis, listeriosis
     • Substance use:
       • Alcohol withdrawal–can cause fever
       • Injection drug use–endocarditis, abscess, HIV
  2. Asks about aggravating factors–what makes fever worse
     • “What makes the fever worse?”
     • Aggravating factors:
       • Physical activity–exercise, movement increases temperature
       • Eating–post-prandial temperature rise
       • Emotional stress–may worsen inflammatory fevers
  3. Asks about maintaining factors–what perpetuates fever
     • “What seems to be keeping the fever going?”
     • Maintaining factors:
       • Poor treatment response–ineffective antibiotics, resistant organisms
       • Non-compliance–incomplete medication courses
       • Inadequate dosing–subtherapeutic antipyretic doses
       • Severe infection–overwhelming sepsis, abscess requiring drainage
       • Ongoing exposure–continued environmental trigger
  4. Asks about relieving factors–what makes fever better
     • “Has anything made the fever better?”
     • Relieving factors:
       • Rest–lying down, minimal activity
       • Cooling measures–cold compresses, cool bath
       • Antipyretics (acetaminophen, ibuprofen):
         • Good response (temperature drops)–suggests inflammatory/infectious cause
         • Poor/no response (temperature stays high)–suggests drug fever, heat-related illness, severe infection, or inadequate dosing

• 2.4Accompanying Symptoms & Circumstances Heuristic

  1. Asks about accompanying symptoms–associated symptoms for source localization
     • “What other symptoms are you experiencing with the fever?”
     • Respiratory:
       • Cough (productive/dry), dyspnea, chest pain, sore throat
       • (→ R-1 Dyspnea, R-2 Cough)–pneumonia, TB, bronchitis
     • Urinary:
       • Dysuria, frequency, urgency, flank pain, suprapubic pain
       • (→ GU-1, GU-3)–pyelonephritis, UTI, prostatitis
     • Gastrointestinal:
       • Abdominal pain, diarrhea, vomiting, nausea, jaundice
       • (→ GI-1, GI-2)–gastroenteritis, appendicitis, cholecystitis, diverticulitis
     • Skin:
       • Rash, localized redness/warmth, swelling, wound drainage
       • (→ D-1 Rash)–cellulitis, abscess, wound infection
     • Neurologic:
       • Headache, confusion, altered mental status, neck stiffness, focal weakness
       • (→ N-1 Headache)–meningitis, encephalitis, brain abscess†
     • Musculoskeletal:
       • Joint pain, swelling, redness, limited range of motion, back pain
       • (→ MS-5 Joint Pain)–septic arthritis, osteomyelitis
     • Constitutional:
       • Weight loss, night sweats (drenching), fatigue, loss of appetite
       • (→ UC-3, UC-6, UC-2)–TB, lymphoma, malignancy, chronic infection
  2. Asks about life circumstances–medical history and context
     • “Tell me about your medical history and any recent exposures.”
     • Chronic medical conditions:
       • Immunocompromised–HIV/AIDS, chemotherapy, immunosuppressants, diabetes†
       • Heart disease–valve disease (endocarditis risk), congenital heart disease
       • Kidney disease–dialysis (access infection risk)
       • Liver disease–cirrhosis (spontaneous bacterial peritonitis risk)
       • Autoimmune diseases–lupus, rheumatoid arthritis, inflammatory bowel disease
       • Cancer–current or previous malignancy
     • Recent medical interventions:
       • Hospitalizations (past 3 months)–hospital-acquired infection risk
       • Surgeries (past month)–post-operative infection
       • Implanted devices–central lines, prosthetic joints, heart valves, pacemakers (seeding risk)†
     • Preventive care:
       • Vaccination status–influenza, COVID-19, pneumococcal, MMR, varicella
       • TB testing history–previous positive tests, prior TB treatment
     • Social context:
       • Sick contacts–family, household members, coworkers with similar illness
       • Recent group activities–conferences, gatherings
       • Travel companions–others sick after same travel

• 2.5Red Flags & Interconnectedness

  Red Flags–Require immediate or urgent evaluation

  Emergency presentations

  • Temperature >40°C (104°F)†
  • Fever + severe headache + neck stiffness–meningitis, immediate evaluation†
  • Fever + confusion/altered mental status–sepsis, CNS infection, emergency†
  • Fever + hypotension/dizziness–septic shock, emergency†
  • Fever + chest pain + dyspnea–pneumonia, pulmonary embolism, endocarditis†
  • Fever + severe abdominal pain + rigidity–acute abdomen, peritonitis, perforation†
  • Fever + rash + petechiae (non-blanching)–meningococcemia, emergency†
  • Fever + focal neurologic signs–CNS infection, brain abscess†

  High-risk presentations

  • Fever duration >3 weeks–FUO, requires extensive workup†
  • New fever in immunocompromised patient–opportunistic infection risk†
  • Fever with prosthetic valve/joint–seeding risk, potential emergency†
  • Fever with severe neutropenia–febrile neutropenia, oncologic emergency†
  • Fever in returning traveler from malaria-endemic area–rule out malaria urgently†

  Interconnectedness

  Fever pattern recognition

  • Continuous fever–constant elevation all day (pneumonia, typhoid)
  • Intermittent fever–fever alternates with normal temperature (malaria, abscess)
  • Remittent fever–temperature fluctuates >1°C daily but stays elevated (most bacterial infections)
  • Relapsing fever–days of fever, then days fever-free, repeating (Borrelia, lymphoma)

  Antipyretic response

  • Good response (temperature drops)–suggests inflammatory/infectious cause
  • Poor/no response–suggests drug fever, heat-related illness, severe infection

  Complaint patterns

  • Fever + severe headache + neck stiffness + photophobia–meningitis†
  • Fever + cough + dyspnea + chest pain–pneumonia
  • Fever + dysuria + flank pain + CVA tenderness–pyelonephritis
  • Fever + RLQ pain + nausea + peritoneal signs–appendicitis†
  • Fever + weight loss + night sweats + lymphadenopathy–TB, lymphoma, malignancy
  • Fever + rash + petechiae + hypotension–meningococcemia†
  • Fever + joint pain + swelling + redness + limited ROM–septic arthritis
  • Fever + confusion + recent surgery/procedure + prosthetic device–device infection, endocarditis†
  • Fever + abdominal pain + jaundice + RUQ tenderness–cholangitis†
  • Fever + returning traveler + malaria-endemic area–malaria until ruled out†

3--Fatigue & Malaise

• 3.1Complaint Heuristic

  1. Asks about the nature of fatigue and malaise
     • “Describe the fatigue. What does it feel like?”
     • Nature of fatigue:
       • Physical tiredness–muscle weakness, heaviness, lack of energy
       • Mental tiredness–poor concentration, mental fog, difficulty thinking
       • Both physical and mental exhaustion
       • Malaise–general feeling of unwellness, discomfort, “not feeling right”
     • Quality:
       • Persistent tiredness despite adequate rest
       • Exhaustion with minimal exertion
       • Post-exertional malaise–worsening after activity
       • Morning fatigue vs. worsening throughout day
       • Sudden energy crashes
  2. Asks about the intensity of fatigue
     • “How is the fatigue affecting your daily activities?”
     • Functional impact:
       • Mild–tired but can complete daily activities
       • Moderate–difficulty completing usual activities, reduced productivity
       • Severe–unable to work, bedridden, requires assistance with daily tasks
     • Activity limitation (behavioral):
       • Can complete full workday
       • Need frequent rest breaks
       • Can only work part-time
       • Unable to work
       • Homebound or bedridden
     • Energy level quantification (numerical):
       • 0-10 scale (0 = no energy, 10 = full energy)
       • Percentage of normal energy
       • Hours able to be active before exhaustion
  3. Asks about localization–distribution of fatigue
     • “Is the fatigue all over or more prominent in specific areas?”
     • Generalized vs. localized:
       • Specific muscle groups–legs, arms, proximal muscles (myopathy, neuromuscular disorders)
       • Specific regions–upper body vs. lower body
       • Whole body fatigue (systemic causes)
     • Associated weakness:
       • Focal weakness–one limb, one side (neurologic causes)
       • True muscle weakness–difficulty lifting, climbing stairs, rising from chair
       • Subjective fatigue without objective weakness
  4. Asks about shifts and radiation–progression patterns
     • “Has the fatigue changed or spread over time?”
     • Migration patterns (temporal):
       • Started generalized, became more localized to specific muscle groups (neuromuscular disease)
       • Started in legs, progressed to arms (ascending pattern suggests specific pathology)
       • Initially whole body, now predominantly proximal muscles (myopathy)
     • Progression patterns:
       • Fluctuating–good days and bad days (chronic fatigue syndrome, mood disorders)
       • Progressive worsening–gradual decline in function (advancing disease, malignancy)
       • Spreading–initially fatigue alone, now with weakness (neuromuscular progression)

• 3.2Time-Intensity Heuristic

  1. Asks about onset–when fatigue started
     • “When did the fatigue start?”
     • Timing:
       • Specific timeframe–days, weeks, months, years ago
       • Sudden onset–within hours to days (infection, acute illness)
       • Gradual onset–over weeks to months (chronic disease, malignancy, endocrine)
       • Insidious–can’t pinpoint when it started (chronic fatigue syndrome, depression)
  2. Asks about course over time–evolution since onset
     • “Has the fatigue been getting better, worse, or staying the same?”
     • Duration:
       • Acute–<1 month (infections, acute illness)
       • Subacute–1-6 months (post-viral, subacute illness)
       • Chronic–>6 months (chronic fatigue syndrome, chronic disease, depression)
     • Progression:
       • Improving–gradually getting better
       • Stable–same level of fatigue consistently
       • Worsening–progressive decline in energy and function
       • Fluctuating–variable energy levels, good periods and bad periods
  3. Asks about course during day–pattern over 24 hours
     • “Does the fatigue follow a pattern during the day?”
     • Diurnal patterns:
       • Worst in morning, improves during day–depression, sleep disorders
       • Worsens throughout day–chronic fatigue, post-exertional malaise
       • Constant throughout day–anemia, hypothyroidism
       • Post-prandial fatigue–worse after meals (diabetes, reactive hypoglycemia)
       • Evening fatigue only–normal aging, mild conditions
  4. Asks about frequency–recurrence pattern
     • “Is the fatigue constant or does it come and go?”
     • Pattern:
       • Constant daily
       • Fluctuating–good days and bad days
       • Episodic–distinct periods of fatigue

• 3.3Triggering & Modifying Factors Heuristic

  1. Asks about triggering factors–what initiated the fatigue
     • “Did anything seem to trigger the fatigue?”
     • Infectious exposures:
       • Recent infection–viral (EBV, COVID-19, influenza), bacterial
       • Post-infectious fatigue–symptoms persist after acute illness resolves
       • Travel to endemic areas (parasites, tropical infections)
     • Medical interventions:
       • Recent surgeries or hospitalizations
       • Radiation or chemotherapy
       • Blood transfusion
     • Life events:
       • Major life stressor–bereavement, job loss, relationship changes
       • Childbirth–postpartum fatigue
       • Trauma–physical or emotional
       • Change in sleep patterns or schedule
     • Medications:
       • Antihypertensives–beta-blockers, diuretics
       • Antihistamines–sedating types
       • Psychiatric medications–antidepressants, benzodiazepines, antipsychotics
       • Pain medications–opioids, muscle relaxants
       • Statins (can cause myopathy)
     • Substances:
       • Alcohol use or recent cessation
       • Recreational drug use
       • Caffeine dependency
     • Dietary factors:
       • Significant diet changes
       • Restrictive dieting
       • Vegan/vegetarian diet without B12 supplementation
       • Poor nutrition or skipping meals
  2. Asks about aggravating factors–what makes fatigue worse
     • “What makes the fatigue worse?”
     • Aggravating factors:
       • Physical activity–exercise, exertion
       • Mental activity–concentration, stress
       • Poor sleep–insufficient sleep, interrupted sleep
       • Skipping meals–hunger, hypoglycemia
       • Heat exposure–hot environments
       • Stress–work stress, emotional stress
  3. Asks about maintaining factors–what perpetuates fatigue
     • “What seems to be keeping the fatigue going?”
     • Maintaining factors:
       • Deconditioning–prolonged inactivity creating cycle of weakness
       • Poor sleep hygiene–irregular schedule, stimulants before bed
       • Ongoing stress–unresolved life stressors
       • Chronic pain–pain disrupting sleep and activity
       • Inadequate treatment–undertreated hypothyroidism, anemia
       • Medication continuation–ongoing sedating medications
  4. Asks about relieving factors–what makes fatigue better
     • “Has anything made the fatigue better?”
     • Relieving factors:
       • Rest–lying down, napping (helps some conditions, not others)
       • Sleep–good night’s sleep improves energy
       • Caffeine–temporary improvement (dependency risk)
       • Exercise–paradoxically helps in some conditions (depression, deconditioning)
       • Eating–improves if hypoglycemic
       • Stress reduction–relaxation, vacation
       • Treatment response–thyroid replacement, iron supplementation

• 3.4Accompanying Symptoms & Circumstances Heuristic

  1. Asks about accompanying symptoms–associated symptoms for differential diagnosis
     • “What other symptoms are you experiencing with the fatigue?”
     • Constitutional symptoms:
       • Fever (→ UC-1)–infection, malignancy, autoimmune disease
       • Weight loss (→ UC-3)–malignancy, hyperthyroidism, chronic infection, depression
       • Night sweats (→ UC-6)–lymphoma, tuberculosis, hyperthyroidism
       • Loss of appetite (→ UC-7)–depression, malignancy, chronic illness
     • Mood/cognitive symptoms:
       • Depressed mood, anhedonia (loss of pleasure)
       • Anxiety, worry
       • Poor concentration, memory problems
       • Suicidal thoughts†
     • Sleep symptoms (→ UC-8):
       • Insomnia–difficulty falling asleep, staying asleep
       • Hypersomnia–excessive sleeping, still tired
       • Unrefreshing sleep–sleep doesn’t restore energy
       • Snoring, witnessed apneas (sleep apnea)
     • Cardiovascular symptoms:
       • Dyspnea (→ R-1)–exertional breathlessness (anemia, heart failure, pulmonary disease)
       • Chest pain (→ CV-1)–cardiac ischemia
       • Palpitations (→ CV-2)–arrhythmia, anemia, hyperthyroidism
       • Edema (→ CV-3)–heart failure, renal failure, liver disease
     • Neurologic symptoms:
       • Headaches (→ N-1)–chronic migraine, brain tumor
       • Muscle weakness (→ N-3)–neuromuscular disease, electrolyte imbalance
       • Numbness/tingling–vitamin B12 deficiency, neuropathy
  2. Asks about life circumstances–medical history and context
     • “Tell me about your medical history and lifestyle.”
     • Chronic medical conditions:
       • Cardiac disease–heart failure, coronary artery disease
       • Pulmonary disease–COPD, asthma
       • Endocrine disease–diabetes, thyroid disease, adrenal insufficiency
       • Autoimmune disease–lupus, rheumatoid arthritis, MS, IBD
       • Psychiatric conditions–depression, anxiety, PTSD
       • Cancer–current or previous malignancy
     • Lifestyle factors:
       • Sleep quantity–<6 hours, 6-8 hours, >8 hours per night
       • Sleep quality–frequent awakenings, unrefreshing
       • Exercise–sedentary vs. active, exercise intolerance
       • Diet–balanced vs. poor nutrition, restrictive diets
       • Substance use–alcohol, tobacco, recreational drugs
       • Caffeine intake–cups per day, dependency
     • Social context:
       • Work hours–long hours, shift work, night shifts
       • Work stress–high-pressure job, job dissatisfaction
       • Caregiver responsibilities–children, elderly parents
       • Recent life changes–moving, divorce, bereavement
       • Financial stress

• 3.5Red Flags & Interconnectedness

  Red Flags–Require immediate or urgent evaluation

  Emergency presentations

  • Fatigue + acute confusion/altered mental status–sepsis, metabolic emergency, stroke†
  • Fatigue + severe headache + fever + neck stiffness–meningitis†
  • Fatigue + chest pain + dyspnea–acute coronary syndrome, pulmonary embolism†
  • Fatigue + syncope/near-syncope–cardiac arrhythmia, severe anemia, adrenal crisis†
  • Fatigue + suicidal ideation–psychiatric emergency†
  • Fatigue + acute focal weakness–stroke, Guillain-Barré syndrome†

  High-risk presentations

  • Fatigue + unintentional weight loss >10 lbs/5 kg–malignancy, chronic infection, hyperthyroidism†
  • Fatigue + persistent fever >2 weeks–infection, malignancy, autoimmune disease†
  • Fatigue + progressive weakness–neuromuscular disease, myopathy†
  • Fatigue + pallor + dyspnea–severe anemia†
  • Fatigue in immunocompromised patient–opportunistic infection†
  • Fatigue + jaundice–liver disease, hemolysis, biliary obstruction†
  • New fatigue in elderly with multiple comorbidities–decompensation of chronic illness†

  Specific syndrome concerns

  • Fatigue + heat intolerance + palpitations + weight loss–hyperthyroidism evaluation
  • Fatigue + cold intolerance + constipation + weight gain–hypothyroidism evaluation
  • Fatigue + polyuria + polydipsia + weight loss–diabetes evaluation
  • Fatigue + hyperpigmentation + hypotension–adrenal insufficiency evaluation†

  Interconnectedness

  Chronic fatigue syndrome criteria (>6 months)

  • Substantial reduction in activity
  • Post-exertional malaise
  • Unrefreshing sleep
  • Plus: Cognitive impairment OR orthostatic intolerance

  Diurnal patterns

  • Worst in morning, improves during day–depression, sleep disorders
  • Worsens throughout day–chronic fatigue, post-exertional malaise
  • Constant throughout day–anemia, hypothyroidism

  Complaint patterns

  • Fatigue + weight loss + night sweats + lymphadenopathy–malignancy, TB, lymphoma
  • Fatigue + depressed mood + anhedonia + sleep changes–depression (PHQ-9 screening)
  • Fatigue + dyspnea + orthopnea + edema–heart failure assessment
  • Fatigue + dyspnea + pallor + exertional intolerance–anemia workup (CBC, iron studies)
  • Fatigue + palpitations + heat intolerance + weight loss–hyperthyroidism (TSH, free T4)
  • Fatigue + joint pain + morning stiffness + rash–rheumatologic disease (RF, ANA, ESR/CRP)
  • Fatigue + muscle weakness + difficulty rising from chair + proximal weakness–myopathy (CK, EMG)
  • Fatigue + insomnia + unrefreshing sleep + snoring–sleep apnea screening (STOP-BANG)
  • Fatigue + abdominal pain + diarrhea + weight loss–celiac/IBD screening
  • Fatigue + post-viral illness + post-exertional malaise + unrefreshing sleep–post-infectious fatigue, chronic fatigue syndrome

4--Weight Loss

• 4.1Complaint Heuristic

  1. Asks about the nature of weight loss
     • “Describe the weight loss. Was it intentional or unintentional?”
     • Nature of weight change:
       • Intentional–purposeful through diet, exercise
       • Unintentional–without trying to lose weight†
       • Awareness–noticed by self vs. others vs. clothes fitting loosely
     • Pattern of loss:
       • Gradual steady decline
       • Rapid weight loss
       • Fluctuating–weight loss alternating with weight gain
       • Plateau–initial loss then stabilized
  2. Asks about the intensity of weight loss
     • “How much weight have you lost and over what period?”
     • Functional impact:
       • No functional limitation
       • Weakness, reduced stamina
       • Difficulty with daily activities
       • Severe debilitation, muscle wasting (cachexia)
     • Clinical significance thresholds:
       • Mild–<5% of body weight in 6 months
       • Moderate–5-10% of body weight in 6 months
       • Severe–>10% of body weight in 6 months†
       • Very severe–>15% of body weight in 6 months†
     • Quantification (numerical):
       • Pounds or kilograms lost
       • Starting weight and current weight
       • Timeframe–over what period
       • Percentage of body weight lost
  3. Asks about localization–distribution of weight loss
     • “Where do you notice the weight loss most?”
     • Body distribution:
       • Generalized–overall weight loss
       • Face–temporal wasting, hollow cheeks
       • Limbs–muscle wasting in arms, legs
       • Trunk–abdominal fat loss
       • Muscle wasting (sarcopenia) vs. fat loss
     • Associated physical changes:
       • Loose skin
       • Prominent bones (ribs, clavicles, hip bones)
       • Loss of subcutaneous fat
       • Muscle atrophy in specific muscle groups
  4. Asks about shifts and radiation–not applicable
     • Weight loss does not shift or radiate spatially; patterns of distribution noted in localization

• 4.2Time-Intensity Heuristic

  1. Asks about onset–when weight loss started
     • “When did you first notice the weight loss?”
     • Timing:
       • Specific timeframe–weeks, months, years ago
       • Sudden onset–rapid weight loss over days to weeks (acute illness, malignancy, hyperthyroidism)
       • Gradual onset–slow progressive loss over months to years (chronic disease, malnutrition, depression)
       • Difficult to pinpoint–insidious, only noticed when clothes don’t fit
  2. Asks about course over time–evolution since onset
     • “Has the weight loss continued or stabilized?”
     • Duration:
       • Acute–<1 month (acute illness, severe stress)
       • Subacute–1-6 months (malignancy, chronic disease)
       • Chronic–>6 months (chronic malnutrition, chronic illness, depression)
     • Progression:
       • Continuing to lose weight–ongoing active loss
       • Stabilized–weight loss stopped at new lower weight
       • Fluctuating–some weight regain, then loss again
       • Improving–weight increasing, recovering
     • Rate of loss:
       • Slow–1-2 lbs per month
       • Moderate–5-10 lbs per month
       • Rapid–>10 lbs per month†
  3. Asks about course during day–appetite patterns
     • “How is your appetite throughout the day?”
     • Related patterns:
       • Morning anorexia vs. evening appetite loss
       • Eating pattern changes–meal skipping, reduced portions
       • Weight fluctuation during day (fluid shifts)
  4. Asks about frequency–recurrence pattern
     • “Have you had similar weight loss episodes before?”
     • Pattern:
       • First episode
       • Recurrent weight loss
       • Weight history–stable vs. fluctuating over life

• 4.3Triggering & Modifying Factors Heuristic

  1. Asks about triggering factors–what initiated the weight loss
     • “Did anything seem to trigger the weight loss?”
     • Intentional weight loss efforts:
       • Dieting–calorie restriction, specific diet plans (keto, intermittent fasting)
       • Exercise program–new or increased physical activity
       • Bariatric surgery–recent or remote history
     • Illness/medical events:
       • Recent acute illness–infection, hospitalization
       • New diagnosis–diabetes, thyroid disease, cancer diagnosis
       • Recent surgery–any major surgery, especially GI surgery
       • New chronic symptoms–pain, dysphagia, dyspnea limiting eating
     • Psychological events:
       • Major life stressor–death, divorce, job loss, trauma
       • Depression onset–loss of interest in food, decreased appetite
       • Anxiety–stress-related appetite loss
       • Bereavement–grief affecting eating
     • Gastrointestinal symptoms:
       • Dysphagia–difficulty swallowing (mechanical obstruction, motility disorder)†
       • Odynophagia–pain with swallowing (esophagitis, ulcer)
       • Early satiety–feeling full quickly (gastroparesis, gastric outlet obstruction, malignancy)
       • Abdominal pain–pain with eating, discouraging food intake
       • Nausea/vomiting–chronic nausea preventing adequate intake
       • Diarrhea–malabsorption, inflammatory bowel disease
     • Medications:
       • Stimulants–amphetamines, methylphenidate (appetite suppression)
       • Diabetes medications–metformin (nausea), SGLT2 inhibitors, GLP-1 agonists
       • Chemotherapy–nausea, mucositis, taste changes
     • Social/environmental factors:
       • Financial constraints–food insecurity, inability to afford adequate food
       • Dental problems–tooth pain, missing teeth, ill-fitting dentures
       • Taste changes–altered taste (dysgeusia), loss of taste (ageusia)
       • Isolation–living alone, eating alone, lack of social support
       • Caregiver loss–death or illness of primary caregiver who prepared meals
  2. Asks about aggravating factors–what makes weight loss worse
     • “What makes the weight loss worse?”
     • Aggravating factors:
       • Ongoing illness–persistent symptoms preventing adequate intake
       • Progressive disease–advancing malignancy, progressive organ failure
       • Continued malabsorption–untreated celiac, pancreatic insufficiency
       • Psychological deterioration–worsening depression, anxiety
       • Social isolation–worsening loneliness, lack of meal companions
       • Financial worsening–increasing poverty, food insecurity
  3. Asks about maintaining factors–what perpetuates weight loss
     • “What seems to be keeping the weight loss going?”
     • Maintaining factors:
       • Inadequate treatment–undertreated malignancy, untreated depression, uncontrolled diabetes
       • Non-compliance–not following nutritional recommendations, refusing supplements
       • Persistent symptoms–ongoing nausea, pain, dysphagia not addressed
       • Deconditioning–weakness leading to decreased activity and muscle loss
       • Metabolic demand–hypermetabolic state (hyperthyroidism, chronic infection)
  4. Asks about relieving factors–what stops or reverses weight loss
     • “Has anything helped stop or reverse the weight loss?”
     • Relieving factors:
       • Treatment of underlying disease–successful cancer treatment, thyroid replacement, depression treatment
       • Symptom control–effective pain management, nausea control, dysphagia treatment
       • Nutritional support–oral supplements, appetite stimulants, enteral feeding
       • Dental care–denture fitting, dental repairs enabling chewing
       • Social support–meal delivery services, assisted living, family support
       • Appetite stimulants–mirtazapine, megestrol, dronabinol (in specific conditions)

• 4.4Accompanying Symptoms & Circumstances Heuristic

  1. Asks about accompanying symptoms–associated symptoms for differential diagnosis
     • “What other symptoms are you experiencing with the weight loss?”
     • Constitutional symptoms:
       • Fever (→ UC-1)–infection, malignancy, autoimmune disease
       • Fatigue (→ UC-2)–malignancy, chronic disease, depression, malnutrition
       • Night sweats (→ UC-6)–lymphoma, tuberculosis, hyperthyroidism
       • Loss of appetite (→ UC-7)–depression, malignancy, chronic illness
     • Gastrointestinal symptoms:
       • Dysphagia–esophageal stricture, achalasia, malignancy†
       • Abdominal pain (→ GI-1)–malignancy, chronic pancreatitis, IBD, celiac disease
       • Nausea/vomiting (→ UC-5)–gastric outlet obstruction, malignancy
       • Diarrhea (→ GI-2)–IBD, celiac disease, malabsorption, hyperthyroidism
       • Steatorrhea–pancreatic insufficiency, celiac disease (fatty, foul-smelling stools)
       • Jaundice–pancreatic cancer, liver disease†
       • Blood in stool (→ GI-4)–colorectal cancer, IBD†
     • Endocrine/metabolic symptoms:
       • Polyuria/polydipsia–diabetes (uncontrolled)
       • Heat intolerance, palpitations, tremor–hyperthyroidism
     • Respiratory symptoms:
       • Dyspnea (→ R-1)–heart failure, COPD, malignancy
       • Chronic cough (→ R-2)–tuberculosis, lung cancer, COPD
       • Hemoptysis (→ R-3)–lung cancer, tuberculosis†
     • Psychological symptoms:
       • Depressed mood, anhedonia–major depression
       • Food restriction behaviors–eating disorders (anorexia nervosa)
       • Body image distortion–eating disorders
  2. Asks about life circumstances–medical history and context
     • “Tell me about your medical history and social situation.”
     • Chronic medical conditions:
       • Malignancy–active cancer, history of cancer, cancer treatment
       • Gastrointestinal disease–IBD, celiac disease, chronic pancreatitis
       • Endocrine disease–diabetes, hyperthyroidism, adrenal insufficiency
       • Psychiatric disease–depression, anxiety, eating disorders
       • Infectious disease–HIV/AIDS, tuberculosis, chronic infections
     • Dental history:
       • Recent dental problems
       • Denture status–fit, functionality
       • Tooth loss, oral pain
     • Social determinants:
       • Food security–reliable access to nutritious food
       • Financial status–ability to afford food
       • Housing–stable housing, access to kitchen
       • Social support–living alone vs. with others, meal companions
       • Isolation–loneliness, lack of social interaction during meals
     • Functional status:
       • Ability to shop–transportation, mobility
       • Ability to cook–physical capability, cognitive function, motivation
       • Ability to eat–self-feeding, swallowing, chewing

• 4.5Red Flags & Interconnectedness

  Red Flags–Require immediate or urgent evaluation

  Emergency presentations

  • Weight loss + severe dehydration + hypotension–hypovolemic shock, adrenal crisis†
  • Weight loss + acute confusion + fever–sepsis, thyroid storm†
  • Weight loss + severe dysphagia + drooling–complete esophageal obstruction†
  • Weight loss + hematemesis or melena–GI bleeding from malignancy or ulcer†
  • Weight loss + jaundice + severe abdominal pain–pancreatic cancer, biliary obstruction†
  • Weight loss + suicidal ideation in context of eating disorder–psychiatric emergency†

  High-risk presentations

  • Unintentional weight loss >10% in 6 months–malignancy until proven otherwise†
  • Weight loss + progressive dysphagia–esophageal or gastric cancer†
  • Weight loss + persistent abdominal pain–pancreatic cancer, gastric cancer, IBD†
  • Weight loss + night sweats + fever–lymphoma, tuberculosis, chronic infection†
  • Weight loss + blood in stool–colorectal cancer†
  • Weight loss + jaundice–pancreatic cancer, hepatobiliary malignancy†
  • Weight loss + cachexia (severe muscle wasting)–advanced malignancy, end-stage organ disease†
  • Weight loss + new lymphadenopathy–lymphoma, metastatic cancer†
  • Rapid weight loss (>10 lbs/month)–malignancy, severe hyperthyroidism, uncontrolled diabetes†

  Interconnectedness

  Key teaching points

  • Always distinguish intentional from unintentional
  • >10% unintentional weight loss = “malignancy until proven otherwise”†
  • Consider social determinants–food security, isolation, poverty
  • Don’t miss reversible causes–dental problems, depression, medication side effects

  Specific syndrome concerns

  • Weight loss + heat intolerance + palpitations + tremor–hyperthyroidism (TSH, free T4)
  • Weight loss + polyuria + polydipsia + polyphagia–uncontrolled diabetes (glucose, HbA1c)
  • Weight loss + diarrhea + abdominal pain + blood in stool–IBD workup
  • Weight loss + steatorrhea + bloating–celiac disease, pancreatic insufficiency
  • Weight loss + severe malnutrition + BMI <16–severe eating disorder, severe malabsorption†

  Complaint patterns

  • Unintentional weight loss + fever + night sweats + lymphadenopathy–malignancy, TB, lymphoma†
  • Weight loss + fatigue + loss of appetite + depressed mood–depression, comprehensive workup
  • Weight loss + dysphagia + odynophagia + progressive difficulty eating–esophageal pathology, endoscopy†
  • Weight loss + abdominal pain + diarrhea + steatorrhea–malabsorption (celiac, pancreatic insufficiency)
  • Weight loss + abdominal pain + jaundice + dark urine–pancreatic cancer evaluation†
  • Weight loss + blood in stool + change in bowel habits–colonoscopy for colorectal cancer†
  • Weight loss + cough + dyspnea + hemoptysis–lung cancer, TB evaluation†
  • Weight loss + palpitations + heat intolerance + tremor–hyperthyroidism (TSH, free T4)
  • Weight loss + elderly + living alone + poor dentition–social determinants, meal services, dental care

5--General Pain

• 5.1Complaint Heuristic

  1. Asks about the nature of pain
     • “Describe the pain. What does it feel like?”
     • Quality/Character:
       • Sharp–stabbing, knife-like, cutting (pleuritic, pericardial, musculoskeletal)
       • Dull–aching, throbbing, pounding (muscle pain, tension, deep visceral)
       • Burning–hot, searing, scalding (neuropathic, reflux, skin)
       • Cramping–squeezing, colicky, spasmodic (visceral hollow organs, muscle spasm)
       • Pressure–heavy, pressing, tight, band-like (cardiac ischemia, tension headache)
       • Electric/shooting–lancinating, shock-like (neuropathic pain)
       • Tearing–ripping sensation (aortic dissection, severe muscle tear)†
     • Temporal pattern:
       • Constant–continuous, unrelenting (inflammation, cancer, severe nerve compression)
       • Intermittent–comes and goes, episodic (angina, migraine, colicky pain)
       • Paroxysmal–sudden attacks with pain-free intervals (trigeminal neuralgia, renal colic)
       • Throbbing/pulsating–rhythmic, beating (vascular, migraine, inflammation)
  2. Asks about the intensity of pain
     • “How severe is the pain? How is it affecting your activities?”
     • Functional impact:
       • Can perform all normal activities without limitation
       • Can work but with some difficulty or discomfort
       • Limits specific activities (walking, lifting, bending)
       • Unable to work or perform daily activities
       • Bedridden or requires assistance with self-care
     • Pain rating scales (numerical):
       • 0-10 scale (0 = no pain, 10 = worst imaginable pain)
       • Mild–1-3 (annoying but tolerable, minimal functional impact)
       • Moderate–4-6 (interferes with activities, difficult to ignore)
       • Severe–7-9 (disabling, dominates awareness, major functional limitation)
       • Very severe/excruciating–10 (unbearable, unable to function)
  3. Asks about localization–pain location
     • “Where exactly is the pain located?”
     • Primary location:
       • Head/neck–frontal, temporal, occipital, cervical
       • Chest–anterior, posterior, lateral
       • Abdomen–RUQ, LUQ, RLQ, LLQ, epigastric, periumbilical, suprapubic
       • Back–cervical, thoracic, lumbar, sacral
       • Extremities–proximal vs. distal, specific joints, entire limb
     • Depth:
       • Superficial–skin, subcutaneous
       • Deep–muscle, bone, internal organs
       • Poorly localized–difficult to pinpoint (visceral pain)
       • Well-localized–can point to exact spot (somatic pain)
  4. Asks about shifts and radiation–pain movement
     • “Does the pain move or spread anywhere?”
     • Migration patterns (temporal):
       • Migrating pain–moves from one location to another (appendicitis: periumbilical → RLQ)
       • Started localized, became generalized (spreading infection, peritonitis)
       • Started generalized, became localized (abscess formation)
     • Radiation patterns (spatial):
       • Chest to left arm/jaw–cardiac ischemia†
       • Back to flank to groin–renal colic (kidney stone)
       • Epigastric to back–pancreatic, aortic, posterior ulcer
       • RUQ to right shoulder/scapula–biliary colic, cholecystitis
       • Neck to arm(s)–cervical radiculopathy
       • Lower back to leg(s)–lumbar radiculopathy (sciatica)

• 5.2Time-Intensity Heuristic

  1. Asks about onset–when pain started
     • “When did the pain start?”
     • Timing:
       • Acute–seconds to minutes (myocardial infarction, aortic dissection, perforation, fracture)†
       • Subacute–hours to days (appendicitis, pneumonia, deep infection)
       • Chronic–weeks to months (osteoarthritis, chronic back pain, cancer)
       • Chronic with acute exacerbation–baseline chronic pain with sudden worsening
     • Circumstances at onset:
       • At rest–spontaneous, cardiac, GI, systemic
       • During specific activity–exertion (cardiac ischemia, musculoskeletal injury)
       • After specific event–trauma, lifting, fall, accident
       • After eating–post-prandial (biliary, pancreatic, mesenteric ischemia, reflux)
       • During sleep–woke patient from sleep (severe, concerning causes)†
  2. Asks about course over time–evolution since onset
     • “Has the pain been getting better, worse, or staying the same?”
     • Progression pattern:
       • Improving–gradually getting better (healing injury, resolving infection)
       • Stable–same intensity consistently (chronic stable condition)
       • Worsening–progressive increase in severity or frequency (advancing disease)†
       • Fluctuating–variable intensity, good days and bad days
       • Crescendo pattern–rapidly accelerating severity (unstable angina, expanding dissection)†
  3. Asks about course during day–pattern over 24 hours
     • “Does the pain follow a pattern during the day?”
     • Diurnal patterns:
       • Worse in morning–stiffness with movement (inflammatory arthritis, ankylosing spondylitis)
       • Morning stiffness >30 minutes suggests inflammatory (vs. <30 min mechanical)
       • Worse with activity during day–mechanical pain (osteoarthritis, muscular)
       • Worse at night–bone pain (cancer, osteomyelitis), inflammatory, peptic ulcer†
       • Night pain waking from sleep–cancer, infection, serious pathology†
  4. Asks about frequency–pattern of recurrence
     • “How often do you experience this pain?”
     • Episode frequency:
       • First time ever–new onset (broad differential)
       • Rare–few times per year
       • Occasional–monthly
       • Frequent–weekly to daily
       • Constant with breakthrough–baseline pain with exacerbations

• 5.3Triggering & Modifying Factors Heuristic

  1. Asks about triggering factors–what initiated the pain
     • “Did anything seem to trigger the pain?”
     • Trauma and injury:
       • Witnessed trauma–direct blow, fall, motor vehicle accident
       • Overuse–repetitive activity, excessive exertion (stress fracture, tendinitis)
       • No trauma–spontaneous onset (pathologic, inflammatory, vascular)
     • Physical activity:
       • Specific movement–lifting, twisting, bending, reaching
       • Exertion–exercise, climbing stairs, walking (cardiac ischemia, vascular disease)
       • Coughing/sneezing–increases intrathoracic pressure (herniated disc, pleurisy)
     • Eating and drinking:
       • Fatty foods–biliary colic
       • Alcohol–pancreatitis
       • Meals in general–post-prandial (biliary, pancreatic, mesenteric ischemia)
       • Fasting–empty stomach (peptic ulcer disease)
     • Medications:
       • NSAIDs–gastritis, ulcers, renal colic
       • Corticosteroids–avascular necrosis, GI bleeding
       • Anticoagulants–bleeding, hematoma
       • Chemotherapy–mucositis, neuropathy
     • Substances:
       • Alcohol–pancreatitis, gastritis
       • Cocaine/stimulants–cardiac ischemia, dissection, bowel ischemia
       • Tobacco–vascular disease, peptic ulcer
  2. Asks about aggravating factors–what makes pain worse
     • “What makes the pain worse?”
     • Movement and activity:
       • General movement–any motion worsens (severe inflammation, fracture, peritonitis)
       • Deep breathing/coughing–pleuritic pain, rib fracture, chest wall
       • Swallowing–esophageal, pharyngeal, mediastinal pathology
     • Positional factors:
       • Lying flat–GERD, heart failure, posterior pain
       • Sitting–lumbar disc, anorectal pathology
       • Standing–mechanical spinal pain, vascular
  3. Asks about maintaining factors–what perpetuates pain
     • “What seems to be keeping the pain going?”
     • Ongoing pathology:
       • Untreated underlying disease–cancer, infection, inflammation
       • Incomplete healing–inadequate rest, premature return to activity
       • Progressive disease–degenerative conditions, advancing malignancy
     • Psychological factors:
       • Catastrophizing–excessive negative interpretation amplifying pain
       • Fear-avoidance–avoiding activity leading to deconditioning
       • Depression/anxiety–lowers pain threshold
  4. Asks about relieving factors–what makes pain better
     • “What makes the pain better?”
     • Rest and positioning:
       • Rest–lying down, stopping activity (musculoskeletal, exertional cardiac)
       • Specific positions–sitting forward (pericarditis, pancreatitis), fetal position (peritonitis)
     • Medications:
       • NSAIDs–inflammatory pain relief
       • Nitroglycerin–cardiac ischemia, esophageal spasm
       • Antacids–GERD, peptic ulcer (helps if GI source)
     • Physical interventions:
       • Heat–muscle pain, chronic arthritis, dysmenorrhea
       • Ice–acute inflammation, acute injury
       • Massage–muscle tension, myofascial pain
     • “Nothing helps”:
       • Severe unrelenting pain–serious pathology concern†

• 5.4Accompanying Symptoms & Circumstances Heuristic

  1. Asks about accompanying symptoms–associated symptoms for differential diagnosis
     • “What other symptoms are you experiencing with the pain?”
     • Constitutional symptoms:
       • Fever (→ UC-1)–infection, malignancy, autoimmune disease†
       • Weight loss (→ UC-3)–malignancy, chronic infection, inflammatory disease†
       • Fatigue (→ UC-2)–systemic illness, chronic disease, depression
       • Night sweats (→ UC-6)–lymphoma, tuberculosis, infection†
     • Chest pain accompanying symptoms:
       • Dyspnea (→ R-1)–cardiac, pulmonary causes†
       • Diaphoresis–acute coronary syndrome†
       • Nausea/vomiting–cardiac ischemia, esophageal
       • Syncope–cardiac arrhythmia, pulmonary embolism†
     • Abdominal pain accompanying symptoms:
       • Nausea/vomiting (→ UC-5)–almost any abdominal pathology
       • Diarrhea (→ GI-2)–gastroenteritis, IBD, ischemia
       • Jaundice–biliary, hepatic pathology†
     • Back pain accompanying symptoms:
       • Leg weakness–cauda equina, cord compression†
       • Bowel/bladder dysfunction–cauda equina syndrome†
       • Saddle anesthesia–cauda equina syndrome†
  2. Asks about life circumstances–medical history and context
     • “Tell me about your medical history and recent events.”
     • Chronic medical conditions:
       • Cardiovascular disease–coronary artery disease, heart failure, peripheral vascular disease
       • Diabetes–neuropathy, vascular disease, infection risk
       • Autoimmune disease–lupus, rheumatoid arthritis, inflammatory bowel disease
       • Cancer–current or previous, metastases, treatment-related pain
       • Chronic pain syndrome–fibromyalgia, chronic fatigue, complex regional pain
     • Risk factors for specific serious conditions:
       • Cardiac risk factors–age, sex, hypertension, diabetes, smoking, family history
       • Cancer risk factors–smoking, family history, age >50, prior cancer
       • DVT/PE risk–immobility, surgery, malignancy, pregnancy, oral contraceptives
     • Recent medical events:
       • Hospitalizations (past 6 months)
       • Surgeries–complications, adhesions
       • Trauma–accidents, falls
     • Medications:
       • Complete current medication list
       • Chronic opioid use–tolerance, hyperalgesia, dependence
       • Anticoagulation–bleeding risk, hematoma

• 5.5Red Flags & Interconnectedness

  Red Flags–Require immediate or urgent evaluation

  Emergency presentations

  • Sudden severe pain reaching peak intensity within seconds to minutes–aortic dissection, ruptured aneurysm, perforated viscus†
  • Chest pain + diaphoresis + dyspnea + nausea–acute coronary syndrome†
  • Tearing chest/back pain radiating to back + blood pressure differential between arms–aortic dissection†
  • Severe headache “worst of my life” + sudden onset–subarachnoid hemorrhage†
  • Back pain + leg weakness + bowel/bladder dysfunction + saddle anesthesia–cauda equina syndrome†
  • Severe abdominal pain + rigid abdomen + peritoneal signs–perforated viscus, peritonitis†
  • Severe pain + altered mental status–sepsis, severe metabolic derangement†

  High-risk presentations

  • Pain + fever + immunocompromised state–serious infection, sepsis risk†
  • Pain + unintentional weight loss >10 lbs (5 kg)–malignancy, chronic serious illness†
  • Night pain waking from sleep consistently–bone cancer, infection, serious inflammatory disease†
  • Progressive worsening pain despite treatment–advancing pathology, missed diagnosis†
  • Bone pain + age >50 + history of cancer–metastatic disease†
  • Joint pain + fever + single hot swollen joint–septic arthritis†
  • Limb pain + pale/cold/pulseless extremity–acute arterial occlusion†

  Interconnectedness

  Pain quality diagnostic clues

  • Sharp/stabbing–pleuritic, pericardial, musculoskeletal
  • Dull/aching–visceral, muscular, deep structures
  • Burning–neuropathic, reflux
  • Tearing/ripping–aortic dissection†
  • Colicky/cramping–hollow viscus obstruction

  Radiation pattern diagnosis

  • Chest to left arm/jaw–cardiac ischemia†
  • Back to flank to groin–renal colic
  • Epigastric to back–pancreatitis, aortic, posterior ulcer
  • RUQ to right shoulder–biliary colic
  • Lower back to leg (dermatomal)–lumbar radiculopathy

  Complaint patterns

  • Crushing chest pain + left arm radiation + diaphoresis + nausea + cardiac risk factors–acute coronary syndrome†
  • Tearing chest/back pain + blood pressure differential between arms–aortic dissection†
  • RUQ pain + right shoulder pain + fatty food trigger + nausea–biliary colic vs. cholecystitis
  • Epigastric pain radiating to back + nausea + vomiting + alcohol use–pancreatitis
  • Severe periumbilical pain migrating to RLQ + fever + anorexia–appendicitis†
  • Flank pain radiating to groin + hematuria + colicky pain + nausea–renal colic
  • Thunderclap headache “worst of life” + sudden onset + meningeal signs–subarachnoid hemorrhage†
  • Lower back pain + leg pain following dermatomal pattern + numbness–lumbar radiculopathy
  • Single joint pain + sudden onset + red/hot/swollen + big toe–gout
  • Single hot swollen joint + fever + pain–septic arthritis†
  • Generalized pain + fatigue + sleep disturbance + multiple tender points–fibromyalgia

6--Nausea & Vomiting

• 6.1Complaint Heuristic

  1. Asks about the nature of nausea and vomiting
     • “Describe the nausea and vomiting. What does it feel like?”
     • Nausea description:
       • Queasy feeling, unsettled stomach, feeling like might vomit
       • Waves of nausea–intermittent vs. continuous
       • Inability to tolerate thought/sight/smell of food
     • Vomiting characteristics:
       • Effortless regurgitation–food comes back up without effort (GERD, rumination)
       • Active vomiting–forceful expulsion with retching
       • Projectile vomiting–forceful ejection without warning (increased ICP, pyloric stenosis)†
       • Retching without productive vomiting–dry heaves
     • Vomitus appearance:
       • Undigested food–recent meal, esophageal/gastric outlet obstruction
       • Bilious–yellow-green bile (small bowel content, post-pyloric)
       • Coffee-ground–partially digested blood (upper GI bleeding)†
       • Bright red blood–active arterial bleeding (severe upper GI bleed)†
       • Feculent–foul-smelling, brown (bowel obstruction, gastrocolic fistula)†
  2. Asks about the intensity of nausea and vomiting
     • “How severe is the nausea? How is it affecting your ability to eat and drink?”
     • Functional impact:
       • Can eat and drink normally with mild nausea
       • Reduced oral intake, tolerating liquids only
       • Unable to keep down any food, can sip liquids
       • Unable to keep down liquids (dehydration risk)†
     • Vomiting frequency (numerical):
       • Occasional–1-2 times per day
       • Frequent–3-5 times per day
       • Very frequent–>5 times per day†
     • Dehydration assessment:
       • Thirst, dry mouth, decreased urination
       • Dizziness when standing (orthostatic hypotension)
       • Confusion (severe dehydration)†
  3. Asks about localization–not applicable
     • Nausea is a generalized sensation; however, associated abdominal pain location is critically important (→ GI-1)
  4. Asks about shifts and radiation–not applicable
     • Nausea and vomiting do not shift or radiate spatially; however, progression patterns are important (initially tolerating liquids → unable to tolerate anything)†

• 6.2Time-Intensity Heuristic

  1. Asks about onset–when nausea/vomiting started
     • “When did the nausea or vomiting start?”
     • Timing:
       • Acute–sudden onset within hours (food poisoning, toxin, acute obstruction, MI)
       • Subacute–over days (gastroenteritis, medication, metabolic)
       • Chronic–weeks to months (gastroparesis, functional, malignancy, chronic disease)
     • Circumstances at onset:
       • After eating–food poisoning, biliary colic, gastroparesis
       • After medication–drug reaction, toxicity
       • During/after travel–infectious gastroenteritis
       • Morning–pregnancy, increased ICP, metabolic
  2. Asks about course over time–evolution since onset
     • “Has the nausea been getting better, worse, or staying the same?”
     • Duration:
       • Acute–<1 week (infections, toxins, acute illness)
       • Subacute–1-4 weeks (post-infectious, medication, early pregnancy)
       • Chronic–>4 weeks (gastroparesis, functional, GERD, malignancy)
     • Progression pattern:
       • Improving–gradually decreasing frequency (resolving infection)
       • Worsening–increasing frequency or inability to tolerate intake†
       • Episodic–distinct episodes with symptom-free intervals (migraine, cyclic vomiting)
  3. Asks about course during day–pattern over 24 hours
     • “Does the nausea follow a pattern during the day?”
     • Diurnal patterns:
       • Morning predominant–”morning sickness” (pregnancy), increased ICP (brain tumor)†
       • Throughout day–gastroenteritis, obstruction, severe GERD
       • Evening/night–GERD, food-related
     • Relationship to meals:
       • Immediately after meals–GERD, food intolerance
       • 1-2 hours after meals–gastric retention, gastroparesis
       • 3-6 hours after meals–delayed gastric emptying, biliary colic
       • Unrelated to meals–central causes (neurologic, metabolic, medication)
  4. Asks about frequency–pattern of vomiting episodes
     • “How often are you vomiting?”
     • Episode frequency:
       • Occasional–monthly (migraine, cyclic vomiting, menstrual-related)
       • Daily–gastroparesis, chronic condition, pregnancy
       • Multiple times daily–severe illness, obstruction, medication effect†

• 6.3Triggering & Modifying Factors Heuristic

  1. Asks about triggering factors–what initiated nausea/vomiting
     • “Did anything seem to trigger the nausea or vomiting?”
     • Food and eating:
       • Specific foods–fatty foods (biliary), dairy (lactose intolerance), spicy foods
       • Contaminated food–food poisoning (onset 2-6 hours: staph; 8-24 hours: bacterial)
       • Large meals–gastroparesis, gastric outlet obstruction
     • Medications:
       • Opioids–common side effect, dose-dependent
       • Antibiotics–particularly erythromycin, azithromycin, metronidazole
       • NSAIDs–gastric irritation, ulceration
       • Chemotherapy–highly emetogenic
       • Digoxin–toxicity causes nausea/vomiting
     • Pregnancy:
       • Last menstrual period–pregnancy screening essential in women of childbearing age†
       • Hyperemesis gravidarum–severe persistent vomiting in pregnancy†
     • Neurologic triggers:
       • Head trauma–concussion, intracranial hemorrhage†
       • Severe headache–migraine, increased ICP, meningitis†
       • Motion–motion sickness, vertigo, vestibular disease
     • Cardiac events:
       • Chest pain–acute coronary syndrome (MI can present with nausea/vomiting)†
     • Metabolic triggers:
       • Diabetic ketoacidosis–hyperglycemia, polyuria, confusion†
       • Uremia–chronic kidney disease, dialysis patient
  2. Asks about aggravating factors–what makes nausea worse
     • “What makes the nausea worse?”
     • Eating and drinking:
       • Any food/liquid intake–obstruction, severe gastroparesis, acute abdomen
       • Fatty foods–biliary disease, gastroparesis
     • Movement and position:
       • Movement–vestibular disease, migraine, motion sickness
       • Lying flat–GERD, increased ICP
     • Sensory triggers:
       • Smells–strong odors, cooking smells (pregnancy, migraine)
  3. Asks about maintaining factors–what perpetuates nausea
     • “What seems to be keeping the nausea going?”
     • Ongoing pathology:
       • Untreated underlying disease–gastroparesis, GERD, ulcer, obstruction
       • Progressive disease–malignancy, bowel obstruction
     • Metabolic derangements:
       • Electrolyte imbalance–hypokalemia, hyponatremia (from vomiting creates vicious cycle)
       • Dehydration–volume depletion perpetuating nausea
  4. Asks about relieving factors–what makes nausea better
     • “Has anything made the nausea better?”
     • Vomiting itself:
       • Relief after vomiting–gastric irritation, food poisoning, migraine
       • No relief after vomiting–obstruction, central causes, functional
     • Medications:
       • Ondansetron–serotonin antagonist, effective for many causes
       • Metoclopramide–prokinetic, good for gastroparesis
       • Acid suppression–proton pump inhibitors (GERD, gastritis, ulcer)
     • Dietary modifications:
       • Small frequent meals–gastroparesis, pregnancy
       • Bland foods–BRAT diet (bananas, rice, applesauce, toast)
       • Ginger–natural antiemetic (pregnancy, mild nausea)
     • “Nothing helps”:
       • Obstruction†
       • Central causes (increased ICP, vestibular)†
       • Severe metabolic derangement†

• 6.4Accompanying Symptoms & Circumstances Heuristic

  1. Asks about accompanying symptoms–associated symptoms for differential diagnosis
     • “What other symptoms are you experiencing with the nausea?”
     • Constitutional symptoms:
       • Fever (→ UC-1)–infection (gastroenteritis, appendicitis, cholecystitis, meningitis)†
       • Weight loss (→ UC-3)–malignancy, chronic illness, eating disorder†
     • Gastrointestinal symptoms:
       • Abdominal pain (→ GI-1)–location critically important for differential†
       • Diarrhea (→ GI-2)–gastroenteritis, food poisoning, IBD
       • Constipation (→ GI-3)–obstruction, opioids, metabolic
       • Hematemesis–upper GI bleeding (ulcer, varices, Mallory-Weiss tear)†
       • Bloating/distension–obstruction, gastroparesis, ascites
       • Early satiety–gastroparesis, gastric outlet obstruction, malignancy
     • Neurological symptoms:
       • Headache (→ N-1)–migraine, increased ICP (tumor, hemorrhage, meningitis)†
       • Vertigo/dizziness (→ N-2)–vestibular disease, dehydration
       • Confusion–metabolic (uremia, DKA, hypercalcemia), infection, increased ICP†
       • Neck stiffness–meningitis†
     • Cardiovascular symptoms:
       • Chest pain (→ CV-1)–acute coronary syndrome (inferior MI classically presents with nausea)†
  2. Asks about life circumstances–medical history and context
     • “Tell me about your medical history and recent exposures.”
     • Pregnancy history:
       • Last menstrual period (LMP)–pregnancy screening
       • Prior pregnancies–history of hyperemesis
     • Chronic medical conditions:
       • Diabetes–gastroparesis, diabetic ketoacidosis risk
       • Chronic kidney disease–uremia causing nausea
       • Migraine disorder–recurrent pattern
       • Cancer–especially with current chemotherapy
       • Gastrointestinal disease–GERD, peptic ulcer, gastroparesis
     • Medications:
       • Complete current medication list
       • Recent changes–new medications, dose increases
       • High-risk medications–opioids, NSAIDs, antibiotics, chemotherapy
       • Digoxin (check level if suspicious)
     • Substance use:
       • Alcohol–acute intoxication, gastritis, pancreatitis
       • Cannabis–paradoxically can cause hyperemesis syndrome
     • Social context:
       • Recent sick contacts–infectious gastroenteritis exposure
       • Recent travel–traveler’s diarrhea, parasitic infections

• 6.5Red Flags & Interconnectedness

  Red Flags–Require immediate or urgent evaluation

  Emergency presentations

  • Vomiting + severe headache “worst ever” + neck stiffness + fever–meningitis, subarachnoid hemorrhage†
  • Vomiting + severe abdominal pain + rigid abdomen + peritoneal signs–perforated viscus, acute abdomen†
  • Vomiting + chest pain + diaphoresis–acute coronary syndrome (inferior MI)†
  • Vomiting + confusion + altered mental status–metabolic emergency (DKA, hypercalcemia, uremia), CNS pathology†
  • Projectile vomiting + headache + papilledema–increased intracranial pressure†
  • Hematemesis + hypotension + tachycardia–life-threatening upper GI bleeding†
  • Feculent vomitus (fecal-smelling)–bowel obstruction, gastrocolic fistula†
  • Vomiting + abdominal pain + no flatus/bowel movements + distension–bowel obstruction†

  High-risk presentations

  • Vomiting + unintentional weight loss >10 lbs (5 kg)–malignancy (gastric, pancreatic), obstruction†
  • Persistent vomiting unable to keep down liquids >24 hours–dehydration risk, electrolyte derangement†
  • Vomiting + jaundice–biliary obstruction, hepatitis, pancreatic pathology†
  • Vomiting + RLQ pain + fever–appendicitis†
  • Vomiting in pregnancy + unable to keep down fluids + weight loss–hyperemesis gravidarum†
  • New-onset vomiting + age >50 + weight loss–malignancy until proven otherwise†
  • Cannabis use + persistent vomiting + relief with hot showers–cannabis hyperemesis syndrome

  Interconnectedness

  Vomitus appearance diagnostic clues

  • Undigested food–recent meal, esophageal/gastric outlet obstruction
  • Bilious (yellow-green)–post-pyloric, small bowel content
  • Coffee-ground–upper GI bleeding (partially digested blood)†
  • Bright red blood–active arterial bleeding†
  • Feculent–bowel obstruction†

  Vomiting providing relief vs. not

  • Relief after vomiting–gastric irritation, food poisoning, migraine
  • No relief after vomiting–obstruction, central causes, functional

  Complaint patterns

  • Nausea/vomiting + RUQ pain + fatty food trigger–biliary colic vs. cholecystitis
  • Nausea/vomiting + epigastric pain radiating to back–pancreatitis
  • Nausea/vomiting + RLQ pain + fever + anorexia–appendicitis†
  • Nausea/vomiting + diarrhea + fever–gastroenteritis
  • Nausea/vomiting + constipation + distension + no flatus–bowel obstruction†
  • Nausea/vomiting + severe headache + fever + neck stiffness–meningitis†
  • Nausea/vomiting + worst headache ever + sudden onset–subarachnoid hemorrhage†
  • Nausea/vomiting + chest pain + diaphoresis + cardiac risk factors–acute coronary syndrome†
  • Morning nausea + missed period + breast tenderness + positive pregnancy test–pregnancy
  • Cyclic episodes of intense nausea/vomiting + symptom-free intervals–cyclic vomiting syndrome
  • Chronic cannabis use + persistent vomiting + relief with hot showers–cannabis hyperemesis syndrome
  • Nausea/vomiting + polyuria + polydipsia + confusion–diabetic ketoacidosis†

7--Night Sweats

• 7.1Complaint Heuristic

  1. Asks about the nature of night sweats
     • “Describe the night sweats. What does it feel like?”
     • True night sweats definition:
       • Drenching sweats–profuse sweating soaking through nightclothes and/or bedding
       • Requiring clothing change–need to change pajamas or bed sheets
       • Occurring during sleep–not just feeling warm, but actual sweating
       • Distinct from normal sweating–beyond what is expected in warm environment
     • Sweating quality:
       • Light perspiration–dampness, mild moisture
       • Moderate sweating–noticeable wetness, clothes damp
       • Heavy sweating–clothes wet through, need to change
       • Drenching/soaking–profuse sweating, bedding soaked, multiple clothing changes†
     • Pattern:
       • Localized sweating–head, neck, chest, specific areas
       • Generalized–entire body sweating
       • Waves–episodes of sudden sweating onset
       • Continuous–persistent sweating throughout night
     • Sensation:
       • Feeling hot before sweating–flushing, heat sensation
       • Sweating without feeling hot–diaphoresis
       • Chills after sweating–temperature dysregulation (infection, sepsis)
       • Shivering–rigors suggesting infection†
  2. Asks about the intensity of night sweats
     • “How severe are the night sweats? How much are they affecting your sleep?”
     • Functional impact:
       • Sleep disruption–number of times waking per night
       • Sleep quality–total sleep hours, daytime fatigue
       • Need to change–clothing only vs. bedding too
       • Frequency of laundry–sheets changed daily, multiple times
       • Daytime functioning–fatigue, work/school performance affected
     • Severity classification:
       • Mild–slight dampness, no clothing change needed, minimal disruption
       • Moderate–noticeable wetness, may change pajamas, wakes occasionally
       • Severe–clothes soaked, require changing, wakes regularly†
       • Very severe–bedding soaked, multiple changes per night, daily functioning impaired†
     • Quantification:
       • Number of clothing changes per night–0, 1, 2, 3+ times†
       • Number of episodes per week–occasional (1-2x), frequent (3-5x), nightly (7x)†
  3. Asks about localization–body distribution of night sweats
     • “Where do you notice the sweating most?”
     • Body distribution:
       • Generalized–entire body (systemic causes: infection, malignancy, hormonal)
       • Upper body–head, neck, chest, arms (menopause, hyperthyroidism)
       • Trunk–chest and back (lymphoma, infection)
       • Head and neck only–focal sweating (sleep apnea, neurologic, medications)
       • One side of body–unilateral (rare: neurologic causes, stroke, nerve injury)
     • Patterns:
       • Symmetric–both sides equally (systemic causes)
       • Asymmetric–one side more than other (neurologic consideration)
  4. Asks about shifts and radiation–not applicable
     • Night sweats do not shift or radiate spatially; however, progression patterns are important
     • Evolution over time:
       • Initially occasional, now nightly (worsening condition)†
       • Initially mild, now drenching (progressive disease)†
       • Initially isolated symptom, now with fever/weight loss (serious pathology concern)†

• 7.2Time-Intensity Heuristic

  1. Asks about onset–when night sweats started
     • “When did the night sweats start?”
     • Timing:
       • Acute–days to weeks (infection, acute illness)
       • Subacute–weeks to months (tuberculosis, lymphoma, chronic infection)
       • Chronic–months to years (menopause, chronic disease)
     • Circumstances at onset:
       • After illness–post-infectious, unresolved infection
       • After travel–tuberculosis, malaria, endemic infections
       • After starting medication–medication side effect
       • Gradual onset–insidious (malignancy, chronic infection, hormonal)
       • Associated with other symptoms–fever, weight loss, cough†
  2. Asks about course over time–evolution since onset
     • “Have the night sweats been getting better, worse, or staying the same?”
     • Duration:
       • Acute–<2 weeks (acute infection)
       • Subacute–2 weeks to 3 months (tuberculosis, subacute infection, early malignancy)
       • Chronic–>3 months (menopause, chronic disease, indolent malignancy)
     • Progression pattern:
       • Improving–gradually decreasing (resolving infection, menopause treatment)
       • Stable–same intensity consistently (stable chronic condition)
       • Worsening–increasing frequency or severity†
       • Fluctuating–variable intensity (hormonal, cyclic patterns)
  3. Asks about course during day–pattern over 24 hours
     • “Do the night sweats follow a pattern?”
     • Timing patterns:
       • Exclusively nocturnal–only during sleep (classic night sweats, narrows differential)
       • Both night and day–day sweats + night sweats (broader differential: hyperthyroidism, medications, anxiety)
       • Early night–first few hours after sleep onset
       • Middle of night–2-4 AM time frame
       • Early morning–just before waking (menopause pattern)
     • Relationship to sleep stages:
       • During deep sleep–true night sweats
       • When first falling asleep–may be environmental (room too warm)
       • Multiple times per night–severe condition or environmental
  4. Asks about frequency–pattern of night sweats episodes
     • “How often do you have night sweats?”
     • Frequency per week:
       • Rare–<1 night per week (may be environmental)
       • Occasional–1-2 nights per week (early phase, mild condition)
       • Frequent–3-5 nights per week (significant pathology concern)†
       • Nightly–every night (serious pathology concern)†
       • Multiple times per night–very concerning for serious disease†
     • Consistency:
       • Every night without fail–highly consistent (serious pathology likely)†
       • Most nights–regular pattern
       • Intermittent–some nights yes, some no
       • Unpredictable–no clear pattern

• 7.3Triggering & Modifying Factors Heuristic

  1. Asks about triggering factors–what initiated the night sweats
     • “Did anything seem to trigger the night sweats?”
     • Infections:
       • Recent acute illness–viral, bacterial infection
       • Tuberculosis exposure–close contacts, travel to endemic areas, immunocompromised†
       • HIV risk factors–unprotected sex, IVDU, blood exposure
       • Travel to endemic areas–malaria, tuberculosis, other endemic infections
     • Menopause and hormonal:
       • Age 45-55–perimenopausal age range (most common cause in women this age)
       • Irregular periods–perimenopause transition
       • Hot flashes during day–vasomotor symptoms (menopause)
       • Androgen deprivation therapy–prostate cancer treatment in men
     • Medications and substances:
       • Antidepressants–SSRIs, SNRIs, tricyclics
       • Hormone therapies–tamoxifen, aromatase inhibitors, GnRH agonists
       • Diabetes medications–hypoglycemia from insulin, sulfonylureas
       • Steroids–prednisone and withdrawal
       • Opioids–withdrawal causes sweating
       • Alcohol–nightly alcohol consumption, alcohol withdrawal
     • Malignancy:
       • Known cancer diagnosis–especially lymphoma, leukemia
       • Prior cancer–recurrence consideration
       • Cancer risk factors–smoking, family history, age, weight loss
     • Environmental factors:
       • Bedroom temperature–room too warm, excessive bedding
       • Season change–summer heat, no air conditioning
       • New bedding–synthetic materials, heavy blankets
  2. Asks about aggravating factors–what makes night sweats worse
     • “What makes the night sweats worse?”
     • Environmental:
       • Warm bedroom–high temperature, poor ventilation
       • Heavy bedding–multiple blankets, comforters
       • Warm clothing–heavy pajamas, synthetic fabrics
       • Alcohol before bed–evening drinking
     • Activities:
       • Evening exercise–late workout, increased metabolic rate
       • Large meals before bed–postprandial thermogenesis
       • Hot drinks–before bedtime
       • Stress–emotional stress, anxiety
     • Medical factors:
       • Infection worsening–progressive illness
       • Disease progression–advancing malignancy, worsening infection
       • Fever–associated febrile illness
  3. Asks about maintaining factors–what perpetuates night sweats
     • “What seems to be keeping the night sweats going?”
     • Ongoing pathology:
       • Untreated infection–tuberculosis, chronic infection, abscess
       • Undiagnosed malignancy–lymphoma, leukemia, solid tumors
       • Untreated menopause–no hormone replacement, no management
       • Poorly controlled chronic disease–hyperthyroidism, diabetes
     • Medication continuation:
       • Ongoing emetogenic medications–antidepressants, hormone therapies
       • Nightly alcohol use–perpetuating sweating
     • Environmental persistence:
       • Consistently warm bedroom–no temperature adjustment
       • Same bedding–not changing to lighter materials
  4. Asks about relieving factors–what makes night sweats better
     • “Has anything made the night sweats better?”
     • Environmental modifications:
       • Cooler room–lower temperature, air conditioning, fan
       • Lighter bedding–fewer blankets, breathable materials
       • Moisture-wicking sleepwear–technical fabrics
       • Lower ambient temperature–60-67°F (15-19°C) ideal for sleep
     • Behavioral changes:
       • Avoiding evening alcohol–stopping nightly drinking
       • Lighter evening meals–smaller dinner, no heavy food before bed
       • Timing medications–taking triggering medications at different times
     • Medical treatments:
       • Hormone replacement therapy (HRT)–estrogen for menopause (highly effective)
       • Antibiotics–if bacterial infection (tuberculosis treatment)
       • Cancer treatment–chemotherapy, radiation for malignancy
       • Thyroid medication adjustment–for hyperthyroidism
     • “Nothing helps”:
       • Progressive malignancy†
       • Untreated serious infection†
       • Suggests need for diagnostic workup

• 7.4Accompanying Symptoms & Circumstances Heuristic

  1. Asks about accompanying symptoms–associated symptoms for differential diagnosis
     • “What other symptoms are you experiencing with the night sweats?”
     • Constitutional symptoms (B symptoms):
       • Fever (→ UC-1)–infection, malignancy (lymphoma)†
       • Weight loss (→ UC-3)–night sweats + fever + weight loss = “B symptoms” (lymphoma, TB)†
       • Fatigue (→ UC-2)–chronic infection, malignancy, anemia
       • Loss of appetite (→ UC-7)–chronic illness, malignancy, depression
     • Infectious symptoms:
       • Cough (→ R-2)–tuberculosis (especially >3 weeks), pneumonia†
       • Hemoptysis (→ R-3)–tuberculosis, malignancy†
       • Dyspnea (→ R-1)–pulmonary involvement (TB, lymphoma, pneumonia)
     • Lymphatic/hematologic symptoms:
       • Lymphadenopathy–enlarged lymph nodes (lymphoma, infection, metastatic cancer)†
       • Pruritus–generalized itching (lymphoma, especially Hodgkin’s)
       • Easy bruising/bleeding–bone marrow involvement (leukemia, lymphoma)
       • Pallor–anemia (chronic disease, malignancy)
     • Endocrine symptoms:
       • Heat intolerance–hyperthyroidism
       • Palpitations (→ CV-2)–hyperthyroidism, anxiety
       • Weight loss despite good appetite–hyperthyroidism†
       • Tremor–hyperthyroidism, anxiety
     • Menopausal symptoms:
       • Hot flashes during day–vasomotor symptoms
       • Irregular periods–perimenopause
       • Vaginal dryness–estrogen deficiency
       • Sleep disturbances (→ UC-8)–insomnia independent of sweats
     • Cardiovascular symptoms:
       • Chest pain (→ CV-1)–endocarditis, cardiac disease
       • Heart murmur–endocarditis (fever + night sweats + new murmur)†
  2. Asks about life circumstances–medical history and context
     • “Tell me about your medical history and risk factors.”
     • Chronic medical conditions:
       • Cancer–current or prior malignancy, type, treatment status
       • Tuberculosis–prior TB, treatment completion, exposure history
       • HIV/AIDS–immunosuppression, opportunistic infection risk
       • Hyperthyroidism–Graves’ disease, toxic nodule, inadequate treatment
       • Diabetes–nocturnal hypoglycemia risk
     • Menopause status (women):
       • Age–perimenopausal age range (45-55)
       • Menstrual history–regular, irregular, stopped
       • Surgical history–hysterectomy, oophorectomy (surgical menopause)
       • Hormone replacement–current or prior HRT use
     • Tuberculosis risk factors:
       • TB exposure–close contacts with active TB†
       • Country of origin–high TB prevalence regions
       • Immunocompromised–HIV, immunosuppressants, diabetes, chronic steroids
       • Healthcare worker–occupational exposure
       • Homeless/incarceration–high-risk populations†
     • HIV risk factors:
       • Unprotected sex–multiple partners, high-risk contacts
       • IVDU–needle sharing
       • Known HIV-positive partner
     • Medications:
       • Complete current medication list
       • Recent changes–new medications, dose adjustments
       • Hormone therapies–tamoxifen, aromatase inhibitors
       • Antidepressants–SSRIs, SNRIs, tricyclics
     • Substance use:
       • Alcohol–quantity, frequency, evening use, withdrawal
       • Tobacco–smoking history (cancer risk)
       • Recreational drugs–IVDU (endocarditis, HIV risk)

• 7.5Red Flags & Interconnectedness

  Red Flags–Require immediate or urgent evaluation

  Emergency presentations

  • Night sweats + fever + altered mental status–sepsis, severe infection, CNS infection†
  • Night sweats + fever + hypotension–septic shock, severe infection†
  • Night sweats + severe dyspnea + hemoptysis–TB, severe pneumonia, PE†
  • Night sweats + chest pain + new heart murmur + fever–endocarditis†

  High-risk presentations

  • Night sweats + fever + unintentional weight loss >10 lbs (5 kg)–”B symptoms”: lymphoma, tuberculosis (classic triad)†
  • Night sweats + chronic cough >3 weeks + weight loss + hemoptysis–tuberculosis until proven otherwise†
  • Night sweats + painless lymphadenopathy–lymphoma, chronic lymphocytic leukemia, metastatic cancer†
  • Night sweats + weight loss + fever + no obvious infectious source–malignancy (lymphoma, leukemia, solid tumor), TB†
  • Night sweats + known cancer history–disease progression, recurrence†
  • Night sweats + immunocompromised state (HIV, transplant, chemotherapy)–opportunistic infection, malignancy†
  • Drenching night sweats every night for >2 weeks–serious pathology likely (infection, malignancy)†
  • Night sweats + supraclavicular lymphadenopathy–high malignancy risk†
  • Night sweats + bone pain + bruising/bleeding–leukemia, bone marrow involvement†
  • Night sweats + fever + IVDU–endocarditis, HIV/opportunistic infections†
  • Age >50 + new-onset night sweats + weight loss–malignancy until proven otherwise†

  Interconnectedness

  “B symptoms” triad (lymphoma, TB)

  • Night sweats + fever + weight loss–lymphoma, tuberculosis, chronic infection†
  • Workup: Chest X-ray, CT chest/abdomen/pelvis, TB testing, lymph node biopsy, blood work (CBC, LDH, ESR)

  Tuberculosis classic presentation

  • Night sweats + chronic cough >3 weeks + weight loss + hemoptysis–TB until proven otherwise†
  • Risk factors: TB exposure, immunocompromised, endemic area, homeless, incarcerated
  • Workup: Chest X-ray (apical infiltrates, cavitation), sputum AFB x3, TB PCR, IGRA or PPD

  Endocarditis triad

  • Night sweats + fever + new heart murmur–endocarditis†
  • Risk factors: IVDU, prosthetic valve, prior endocarditis, structural heart disease
  • Workup: Blood cultures x3, echocardiogram (TTE then TEE), Duke criteria assessment

  Hyperthyroidism presentation

  • Night sweats + weight loss + palpitations + heat intolerance + diarrhea–hyperthyroidism
  • Workup: TSH (suppressed), free T4/T3 (elevated), thyroid ultrasound

  Menopause constellation

  • Night sweats + hot flashes + irregular periods + age 45-55–perimenopause/menopause (most common cause in women this age)
  • Clinical diagnosis, FSH/LH if unclear
  • Treatment: HRT (if no contraindications), SSRIs, gabapentin

  Complaint patterns

  • Night sweats + painless lymphadenopathy + pruritus + early satiety–lymphoma†
  • Night sweats + fever + IVDU + new heart murmur + splinter hemorrhages–infective endocarditis†
  • Night sweats + weight loss despite increased appetite + tremor + exophthalmos–Graves’ disease (hyperthyroidism)
  • Night sweats + type 1 diabetes on insulin + morning headaches + nightmares–nocturnal hypoglycemia
  • Night sweats + alcohol use + cessation/reduction + tremor + anxiety–alcohol withdrawal
  • Night sweats + HIV+ + chronic diarrhea + CD4 <50 + fever–disseminated Mycobacterium avium complex (MAC)†
  • Night sweats + antidepressant initiation 2-4 weeks prior + otherwise well–medication side effect (SSRI/SNRI)
  • Homelessness + night sweats + cough–TB until proven otherwise†
  • Healthcare worker + night sweats + cough–occupational TB exposure†

8--Loss of Appetite

• 8.1Complaint Heuristic

  1. Asks about the nature of appetite loss
     • “Describe the change in your appetite. What does it feel like?”
     • Nature of appetite change:
       • Complete loss of appetite (anorexia)–no desire to eat at all
       • Reduced appetite–decreased interest in food, eating less than usual
       • Early satiety–feeling full after eating small amounts
       • Food aversion–specific foods no longer appealing, previously enjoyed foods now unappealing
       • Nausea without vomiting–queasy feeling discouraging eating
     • Quality of appetite loss:
       • Total–no hunger sensations, no interest in food
       • Partial–some foods still appealing, others not
       • Selective–aversion to specific types (meats, sweets, fatty foods)
       • Smell-triggered–food smells become unpleasant or nauseating
       • Situational–appetite present at some times, absent at others
  2. Asks about the intensity of appetite loss
     • “How severe is the appetite loss? How is it affecting your ability to eat?”
     • Functional impact:
       • Maintaining adequate caloric intake despite reduced appetite
       • Inadequate caloric intake–losing weight unintentionally
       • Severe malnutrition–significant weight loss, weakness, fatigue
     • Behavioral indicators:
       • Skipping occasional meals
       • Skipping one meal daily (typically breakfast)
       • Eating only one meal per day
       • Grazing–small amounts throughout day instead of meals
       • Not eating for days
     • Severity descriptors:
       • Mild–eating slightly less than usual, can finish most meals with effort
       • Moderate–eating 50% of usual portions, leaving food on plate regularly
       • Severe–eating very little, few bites per meal, forcing self to eat
       • Complete–unable to eat, refusing food entirely
  3. Asks about localization–not applicable
     • Appetite loss is not localized
  4. Asks about shifts and radiation–not applicable
     • Appetite loss does not shift or radiate spatially; temporal patterns are addressed in course during day
  5. Asks about the nature of loss of appetite
     • “Tell me about your appetite. How has it changed?”
     • Nature of appetite change:
       • Complete loss of appetite (anorexia): No desire to eat at all
       • Reduced appetite: Decreased interest in food, eating less than usual
       • Early satiety: Feeling full after eating small amounts
       • Food aversion: Specific foods no longer appealing, previously enjoyed foods now unappealing
       • Nausea without vomiting: Queasy feeling discouraging eating
     • Quality of appetite loss:
       • Total: No hunger sensations, no interest in food
       • Partial: Some foods still appealing, others not
       • Selective: Aversion to specific types (meats, sweets, fatty foods)
       • Smell-triggered: Food smells become unpleasant or nauseating
       • Situational: Appetite present at some times, absent at others.
  6. Asks about the severity of appetite loss
     • “How much are you eating compared to normal?”
     • Degree of appetite reduction:
       • Mild: Eating slightly less than usual, can finish most meals with effort
       • Moderate: Eating 50% of usual portions, leaving food on plate regularly
       • Severe: Eating very little, few bites per meal, forcing self to eat
       • Complete: Unable to eat, refusing food entirely
     • Impact on eating behavior:
       • Skipping occasional meals
       • Skipping one meal daily (typically breakfast)
       • Eating only one meal per day
       • Grazing: Small amounts throughout day instead of meals
       • Not eating for days
     • Resulting nutritional intake:
       • Maintaining adequate caloric intake despite reduced appetite
       • Inadequate caloric intake: Losing weight unintentionally
       • Severe malnutrition: Significant weight loss, weakness, fatigue

• 8.2Time-Intensity Heuristic

  1. Asks about onset–when appetite loss started
     • “When did you first notice your appetite changed?”
     • Timing:
       • Sudden onset–appetite lost abruptly within hours to days (acute illness, acute stress, medication)
       • Gradual onset–slow progressive loss over weeks to months (chronic disease, depression, malignancy)
       • Insidious–cannot pinpoint when appetite changed, noticed over time
     • Specific timeframe:
       • Days ago
       • Weeks ago
       • Months ago
  2. Asks about course over time–evolution since onset
     • “Has your appetite been getting better, worse, or staying the same?”
     • Duration:
       • Acute–<2 weeks (acute illness, acute stress, medication side effect)
       • Subacute–2 weeks to 2 months (subacute illness, developing depression)
       • Chronic–>2 months (chronic disease, chronic depression, malignancy)
     • Progression:
       • Improving–appetite gradually returning, eating more
       • Stable–appetite consistently reduced at same level
       • Worsening–progressive decline in appetite and intake
       • Fluctuating–good appetite days alternating with poor appetite days
     • Response to interventions:
       • Improved with specific treatment (e.g., depression treatment, symptom management)
       • No improvement despite efforts
       • Temporary improvement then decline again
  3. Asks about course during day–pattern over 24 hours
     • “Does your appetite follow a pattern during the day?”
     • Diurnal appetite patterns:
       • Morning anorexia–no appetite on waking, improves during day (depression, uremia, medications)
       • Progressive decline–appetite best in morning, worsens throughout day (fatigue, chronic illness)
       • Constant–equally poor appetite throughout all day
       • Evening appetite–appetite improves in evening (some depression patterns)
       • Meal-specific–appetite for some meals but not others
  4. Asks about frequency–not directly applicable
     • Appetite loss is typically a continuous state rather than episodic
     • Pattern considerations:
       • Constant poor appetite–every day
       • Intermittent–some days better than others
       • Cyclical–pattern related to menstrual cycle, mood cycles

• 8.3Triggering & Modifying Factors Heuristic

  1. Asks about triggering factors–what initiated the appetite loss
     • “Did anything seem to trigger the loss of appetite?”
     • Acute illness:
       • Recent infection–viral (influenza, COVID-19, gastroenteritis), bacterial
       • Acute medical event–hospitalization, surgery, acute exacerbation of chronic disease
       • New symptoms–pain, nausea, dyspnea making eating difficult
     • Chronic illness progression:
       • Worsening chronic disease–heart failure, COPD, kidney disease, liver disease
       • New cancer diagnosis or cancer progression
       • Advanced dementia–forgetting to eat, losing interest in food
     • Psychological triggers:
       • Major life stressor–death of loved one, divorce, job loss, financial crisis
       • Depression onset–loss of interest in food, loss of pleasure in eating
       • Anxiety–stress-related appetite suppression
       • Grief–bereavement affecting all aspects of life including eating
     • Gastrointestinal symptoms:
       • Nausea–persistent queasiness discouraging eating
       • Abdominal pain–pain with eating, fear of pain causing food avoidance
       • Dysphagia–difficulty swallowing making eating effortful
       • Early satiety–feeling full quickly, bloating
       • Altered taste (dysgeusia)–medications, zinc deficiency, chemotherapy
       • Altered smell (anosmia, parosmia)–COVID-19, medications, neurologic disease
     • Medications and treatments:
       • Chemotherapy–nausea, mucositis, taste changes
       • Antibiotics–nausea, taste disturbance
       • Opioid pain medications–nausea, constipation, sedation
       • Antidepressants–some suppress appetite (SSRIs), others increase (mirtazapine)
       • Stimulants–amphetamines, methylphenidate
       • Digoxin–anorexia, nausea (toxicity sign)
       • Metformin–nausea, GI upset
       • Radiation therapy–especially to head/neck, chest, abdomen
     • Dental/oral problems:
       • Tooth pain–dental caries, abscess, periodontal disease
       • Missing teeth–difficulty chewing
       • Ill-fitting dentures–pain with chewing, food avoidance
       • Oral infections–candidiasis (thrush), herpes stomatitis
       • Xerostomia–dry mouth from medications, Sjögren’s syndrome
     • Social/environmental factors:
       • Living alone–eating alone, lack of meal companionship
       • Recent loss–death of spouse/partner who cooked meals
       • Financial stress–food insecurity, inability to afford preferred foods
  2. Asks about aggravating factors–what makes appetite loss worse
     • “What makes your appetite worse?”
     • Worsening symptoms–increasing nausea, pain, dyspnea
     • Stress–ongoing life stressors, anxiety
     • Loneliness–eating alone, social isolation
     • Depression worsening–deepening mood symptoms
     • Specific foods–foods that trigger nausea or aversion
     • Medication side effects–ongoing nausea, taste changes
     • Unpleasant meal environment–hospital food, institutional settings
     • Fatigue–too tired to prepare or eat food
     • Uncontrolled pain–pain discouraging eating
  3. Asks about maintaining factors–what perpetuates appetite loss
     • “What seems to be keeping your appetite poor?”
     • Inadequate treatment–undertreated depression, uncontrolled symptoms (pain, nausea)
     • Continued illness–ongoing active disease process
     • Malnutrition cycle–poor intake → weakness → less able to prepare/eat food → worse nutrition
     • Medication continuation–ongoing medications with appetite-suppressing effects
     • Persistent nausea–uncontrolled nausea despite treatment attempts
     • Ongoing dental problems–untreated oral pain, missing teeth
     • Social isolation–continued eating alone, lack of social support
     • Financial constraints–ongoing food insecurity
  4. Asks about relieving factors–what improves appetite
     • “Has anything made your appetite better?”
     • Treatment of underlying disease–cancer remission, infection resolution, depression treatment
     • Symptom control–effective nausea management, pain control
     • Appetite stimulants–mirtazapine (antidepressant with appetite effect), megestrol acetate, dronabinol
     • Social eating–eating with others, meal companionship
     • Favorite foods–preparing foods patient enjoys
     • Small frequent meals–easier to tolerate than large meals
     • Environmental changes–pleasant meal setting, reducing stressors
     • Dental treatment–denture fitting, tooth repairs
     • Psychological support–depression treatment, grief counseling, anxiety management
     • Nutritional supplements–oral nutrition supplements between meals
     • Exercise–light physical activity can stimulate appetite

• 8.4Accompanying Symptoms & Circumstances Heuristic

  1. Asks about accompanying symptoms–associated symptoms for differential diagnosis
     • “What other symptoms are you experiencing with the appetite loss?”
     • Constitutional symptoms:
       • Weight loss (→ UC-3)–unintentional weight loss from reduced intake†
       • Fatigue (→ UC-2)–weakness, low energy from poor nutrition or underlying disease
       • Fever (→ UC-1)–infection, malignancy, autoimmune disease
       • Night sweats (→ UC-6)–lymphoma, tuberculosis, malignancy
     • Gastrointestinal symptoms:
       • Nausea/vomiting (→ UC-5)–GI obstruction, gastroparesis, medication, pregnancy
       • Abdominal pain (→ GI-1)–gastritis, peptic ulcer, pancreatitis, malignancy, IBD†
       • Early satiety–gastroparesis, gastric outlet obstruction, gastric cancer
       • Dysphagia–esophageal stricture, cancer, motility disorder†
       • Diarrhea (→ GI-2)–IBD, celiac disease, chronic infection
       • Constipation (→ GI-3)–opioid use, hypothyroidism, depression, obstruction
       • Altered taste (dysgeusia)–medications, zinc deficiency, chemotherapy
       • Altered smell (anosmia, parosmia)–COVID-19, medications, neurologic disease
     • Psychological symptoms:
       • Depressed mood–loss of interest, sadness, hopelessness
       • Anhedonia–loss of pleasure in activities, including eating
       • Anxiety–worry, stress affecting appetite
       • Suicidal thoughts–severe depression†
       • Grief–bereavement affecting all life functions
     • Respiratory symptoms:
       • Dyspnea (→ R-1)–heart failure, COPD, lung disease limiting eating
       • Chronic cough (→ R-2)–lung disease, malignancy
     • Cardiac symptoms:
       • Dyspnea, orthopnea, edema (→ CV-3)–heart failure (early satiety from hepatic congestion)
     • Neurologic symptoms:
       • Cognitive changes–dementia affecting eating behavior, forgetting to eat
       • Dysphagia–stroke, Parkinson’s, neuromuscular disease
       • Anosmia–loss of smell affecting appetite
     • Renal symptoms:
       • Nausea, metallic taste–uremia in kidney disease
       • Decreased urine output–advanced kidney disease
     • Pain:
       • Abdominal pain–affecting eating
       • Dental/oral pain–discouraging chewing
       • Generalized pain (→ UC-4)–chronic pain affecting appetite
  2. Asks about life circumstances–medical history and context
     • “Tell me about your medical history and living situation.”
     • Chronic medical conditions:
       • Malignancy–active cancer, history of cancer, treatment status
       • Gastrointestinal disease–GERD, peptic ulcer, gastroparesis, IBD, celiac disease, chronic pancreatitis
       • Cardiac disease–heart failure (hepatic congestion causing early satiety)
       • Pulmonary disease–COPD, advanced lung disease (dyspnea with eating)
       • Kidney disease–chronic kidney disease, dialysis (uremia, nausea)
       • Liver disease–cirrhosis, hepatitis (early satiety, nausea)
       • Psychiatric disease–major depression, anxiety disorders, eating disorders
       • Neurologic disease–dementia, Parkinson’s disease, stroke
     • Cancer history:
       • Type of cancer
       • Treatment–chemotherapy, radiation (especially head/neck, chest, abdomen)
       • Treatment side effects–mucositis, taste changes, nausea
       • Disease status–active vs. remission
     • Medications:
       • Complete current medication list
       • Recent medication changes
       • Medications known to suppress appetite
       • Chemotherapy agents
       • Opioid use
     • Dental history:
       • Dental problems–cavities, missing teeth, periodontal disease
       • Denture status–fit, comfort, functionality
       • Oral pain
     • Weight history:
       • Current weight and usual weight
       • Amount of weight lost–pounds (lbs) or kilograms (kg)
       • Timeframe of weight loss
       • Intentional vs. unintentional weight loss
     • Social situation:
       • Living arrangement–alone vs. with others
       • Meal companions–eating alone vs. with others
       • Recent losses–death of spouse, partner, close friend
       • Social isolation–loneliness, lack of social interaction
     • Food access:
       • Food security–reliable access to adequate food
       • Financial resources–ability to afford food
       • Ability to shop and cook–physical capability, cognitive function

• 8.5Red Flags & Interconnectedness

  Red Flags–Require immediate or urgent evaluation

  Emergency presentations

  • Appetite loss + severe dehydration + altered mental status–severe malnutrition, metabolic derangement, adrenal crisis†
  • Appetite loss + suicidal ideation–depression with suicide risk (psychiatric emergency)†
  • Appetite loss + severe abdominal pain + vomiting–bowel obstruction, acute abdomen†
  • Appetite loss + confusion + fever–sepsis, meningitis, severe infection†
  • Appetite loss + severe weakness + unable to stand–severe malnutrition, electrolyte imbalance†

  High-risk presentations

  • Appetite loss + unintentional weight loss >10% body weight in 6 months–malignancy, severe chronic disease†
  • Appetite loss + progressive dysphagia–esophageal cancer, stricture†
  • Appetite loss + persistent vomiting–obstruction, severe gastroparesis†
  • Appetite loss + jaundice–pancreatic cancer, hepatobiliary disease, severe liver disease†
  • Appetite loss + persistent abdominal pain–malignancy, chronic pancreatitis, IBD†
  • Appetite loss in elderly with multiple comorbidities–high risk for rapid decline, malnutrition†
  • Appetite loss + cachexia (severe muscle wasting)–advanced malignancy, end-stage organ disease†
  • Appetite loss + severe depression + self-neglect–high risk for malnutrition, suicide†
  • Appetite loss in patient with eating disorder history–relapse risk, medical complications†
  • Appetite loss + metallic taste + decreased urine output–uremia (severe kidney disease)
  • Appetite loss + severe fatigue + hypotension + hyperpigmentation–adrenal insufficiency†

  Interconnectedness

  Constitutional symptom clusters

  • Weight loss (unintentional >10 lbs/5 kg) (→ UC-3)–malignancy screening (imaging, labs, endoscopy, age-appropriate cancer screening)†
  • Fatigue + weight loss (→ UC-2 + UC-3)–comprehensive workup (malignancy, chronic disease, depression, malnutrition)
  • Fever + night sweats + weight loss (→ UC-1 + UC-6 + UC-3)–TB/lymphoma/malignancy evaluation†

  Gastrointestinal symptom clusters

  • Nausea/vomiting + early satiety (→ UC-5)–gastroparesis, gastric outlet obstruction, gastric cancer evaluation
  • Abdominal pain + weight loss (→ GI-1 + UC-3)–pancreatic cancer, gastric cancer, IBD evaluation†
  • Dysphagia + weight loss–esophageal pathology evaluation (upper endoscopy, barium swallow): cancer, stricture, achalasia†
  • Early satiety + abdominal bloating–gastroparesis, gastric outlet obstruction, ovarian cancer (in women)
  • Diarrhea + weight loss + abdominal pain (→ GI-2 + GI-1)–celiac disease, IBD, malabsorption

  Psychological clusters

  • Depressed mood + anhedonia + sleep changes–depression screening (PHQ-9), psychiatric evaluation
  • Anxiety + weight loss + palpitations–anxiety disorder vs. hyperthyroidism differentiation (TSH, psychiatric evaluation)
  • Grief + social isolation + self-neglect–bereavement counseling, social work referral, meal support services

  Metabolic/endocrine clusters

  • Hyperpigmentation + hypotension + nausea–adrenal insufficiency evaluation (cortisol, ACTH stimulation test)†
  • Polyuria + polydipsia + nausea–diabetes evaluation (glucose, HbA1c), diabetic gastroparesis if known diabetes

  Cardiac/respiratory clusters

  • Dyspnea + orthopnea + edema + early satiety (→ R-1 + CV-3)–heart failure evaluation (BNP, echocardiogram)
  • Dyspnea with eating + weight loss (→ R-1)–COPD, advanced lung disease (pulmonary function tests, chest imaging)

  Complaint patterns

  • Appetite loss + early satiety + abdominal fullness + weight loss in older adult–consider gastric cancer (upper endoscopy)†
  • Appetite loss + jaundice + abdominal pain + weight loss–consider pancreatic cancer (CT/MRI abdomen, CA 19-9, endoscopic ultrasound)†
  • Appetite loss + chronic nausea + early satiety + known diabetes–consider diabetic gastroparesis (gastric emptying study)
  • Appetite loss + dysgeusia + anosmia + post-viral illness–post-viral syndrome (supportive care, zinc supplementation trial)
  • Appetite loss + severe depression + self-neglect + social withdrawal–depression with high malnutrition risk (aggressive psychiatric treatment, nutritional support)
  • Living alone + appetite loss + weight loss–social isolation, depression evaluation; meal delivery services, social work referral
  • Financial stress + food insecurity–social work referral for food assistance (SNAP benefits, food banks)
  • Dental problems + appetite loss + weight loss–dental referral, soft diet, nutritional supplements

9--Disturbance with Sleep

• 9.1Complaint Heuristic

  1. Asks about the nature of sleep disturbances
     • “Describe the sleep problem. What happens when you try to sleep?”
     • Type of sleep problem:
       • Insomnia–difficulty falling asleep, staying asleep, or early morning awakening
       • Hypersomnia–excessive daytime sleepiness, sleeping too much
       • Parasomnia–abnormal behaviors during sleep (sleepwalking, night terrors, REM behavior disorder)
       • Circadian rhythm disorder–sleep-wake cycle misalignment
       • Sleep-related breathing disorder–snoring, apneas, gasping
       • Restless legs syndrome–uncomfortable leg sensations, urge to move legs
       • Unrefreshing sleep–adequate hours but not feeling rested
     • Insomnia subtypes:
       • Sleep onset insomnia–difficulty falling asleep initially (>30 min to fall asleep)
       • Sleep maintenance insomnia–frequent awakenings during night
       • Early morning awakening–waking 2+ hours before desired, can’t return to sleep (depression)
       • Mixed–combination of above
     • Sleep quality:
       • Restorative–wake feeling refreshed, energized
       • Unrefreshing–adequate hours but wake tired (sleep apnea, poor sleep quality)
       • Light sleep–easily awakened, never feel deeply asleep
       • Fragmented–multiple awakenings, disrupted continuity
     • Daytime sleepiness:
       • Mild–occasionally drowsy, can stay awake if needed
       • Moderate–falls asleep in passive situations (watching TV, reading)
       • Severe–falls asleep in active situations (talking, eating, driving)†
     • Sleep-related breathing:
       • Snoring–loud snoring reported by bed partner
       • Witnessed apneas–bed partner observes breathing pauses†
       • Gasping/choking–waking up gasping for air, choking sensation†
  2. Asks about the intensity of sleep disturbances
     • “How severe is the sleep problem? How is it affecting your daily life?”
     • Functional impact:
       • Work/school performance–concentration, productivity, errors, absences
       • Driving safety–risk of falling asleep at wheel†
       • Mood–irritability, depression, anxiety
       • Physical health–headaches, fatigue, immune function
       • Relationships–partner disturbance, interpersonal conflicts
     • Daytime consequences:
       • Concentration impairment–memory problems, difficulty focusing
       • Mood changes–irritability, depression, anxiety
       • Physical symptoms–headaches, muscle aches, GI symptoms
       • Microsleeps–brief unintended sleep episodes†
     • Severity descriptors:
       • Mild–occasional difficulty (1-2 nights per week), minimal daytime impact
       • Moderate–frequent difficulty (3-4 nights per week), noticeable daytime fatigue
       • Severe–nightly difficulty (5+ nights per week), significant functional impairment
       • Very severe–unable to sleep without medications, severe daytime dysfunction
     • Sleep quantity:
       • Total sleep time per night–<4 hours (severe), 4-6 hours (moderate), 6-7 hours (mild), 7-9 hours (normal)
       • Naps–frequency, duration, whether restorative
  3. Asks about localization–not applicable
     • Sleep disturbances are not localized; however, sleep position and environment are relevant
     • Sleep position:
       • Supine (on back)–worsens obstructive sleep apnea
       • Side sleeping–often improves OSA
       • Position changes during night–may indicate discomfort, restless legs
     • Bedroom environment:
       • Noise, light, temperature
       • Mattress/pillow comfort
       • Bed partner disturbances
  4. Asks about shifts and radiation–not applicable
     • Sleep disturbances do not shift or radiate spatially; however, evolution of sleep patterns is important
     • Evolution over time:
       • Started with onset insomnia, now also maintenance insomnia (worsening)
       • Started with poor sleep, now excessive daytime sleepiness (untreated sleep apnea progressing)†
       • Development of new symptoms–snoring started, witnessed apneas began†

• 9.2Time-Intensity Heuristic

  1. Asks about onset–when sleep disturbances started
     • “When did the sleep problem start?”
     • Timing:
       • Acute–<3 months (stress, life event, medical illness, medication)
       • Chronic–≥3 months (chronic insomnia disorder, sleep apnea, chronic medical condition)
       • Lifelong–since childhood (primary sleep disorder, ADHD)
     • Specific timeframe:
       • Days to weeks–acute stressor, illness, medication
       • Months–subacute stress, developing sleep disorder
       • Years–chronic condition, long-standing sleep apnea
       • “As long as I can remember”–primary disorder, childhood onset
     • Circumstances at onset:
       • Specific stressor–job loss, bereavement, relationship changes, financial stress
       • Medical illness–new diagnosis, hospitalization, surgery
       • Medication change–new medication, dose change
       • Life transition–retirement, new job, moving, new baby
       • Gradual onset–no identifiable trigger (primary sleep disorder)
  2. Asks about course over time–evolution since onset
     • “Has the sleep problem been getting better, worse, or staying the same?”
     • Duration:
       • Acute insomnia–<3 months (situational, stress-related)
       • Chronic insomnia–≥3 months (meets criteria for chronic insomnia disorder)
       • Long-standing–years (sleep apnea, chronic insomnia, circadian disorder)
     • Progression pattern:
       • Improving–gradually getting better (acute stressor resolving)
       • Stable–same pattern consistently (chronic stable condition)
       • Worsening–progressive deterioration (sleep time decreasing, more awakenings)†
       • Fluctuating–good periods and bad periods (stress-related, mood-related)
       • Episodic–periods of insomnia alternating with normal sleep
  3. Asks about course during day–pattern over 24 hours
     • “Does your sleep follow a pattern? When do you feel sleepy?”
     • Sleep timing (circadian pattern):
       • Normal sleep-wake–bedtime 10 PM-midnight, wake 6-8 AM
       • Delayed sleep phase–can’t fall asleep until 2-4 AM, difficulty waking morning (adolescents, young adults)
       • Advanced sleep phase–sleepy by 8 PM, wake 4-5 AM (elderly)
       • Irregular sleep-wake–no consistent pattern (shift work, circadian disorder)
     • Daytime sleepiness pattern:
       • Morning–difficulty waking, grogginess (insufficient sleep, depression)
       • Afternoon–post-lunch dip 1-3 PM (normal circadian pattern, exaggerated if sleep-deprived)
       • Evening–second wind, more alert (delayed sleep phase)
       • Constant throughout day–severe sleep deprivation, sleep apnea, narcolepsy†
       • Irresistible sleep attacks–narcolepsy†
     • Activities affected by sleepiness:
       • Passive–reading, watching TV, sitting quietly (mild-moderate sleepiness)
       • Active–talking, eating, standing (moderate-severe sleepiness)
       • Critical–driving, operating machinery (severe sleepiness, dangerous)†
  4. Asks about frequency–pattern of sleep disturbances
     • “How often do you have trouble sleeping?”
     • Frequency per week:
       • Occasional–1-2 nights per week (mild, situational)
       • Frequent–3-4 nights per week (moderate)
       • Most nights–5-6 nights per week (severe)
       • Every night–7 nights per week (chronic severe)
     • Consistency:
       • Every night consistently–chronic condition likely
       • Weeknights but not weekends–stress-related, work-related, insufficient sleep on weeknights
       • Weekends but not weeknights–social jetlag, irregular schedule
       • Unpredictable–no clear pattern (variable stressors)
     • Chronic insomnia criteria:
       • Sleep difficulty ≥3 nights per week
       • Duration ≥3 months
       • Despite adequate opportunity for sleep
       • Associated with daytime impairment

• 9.3Triggering & Modifying Factors Heuristic

  1. Asks about triggering factors–what initiated the sleep disturbances
     • “Did anything seem to trigger the sleep problem?”
     • Life stressors (most common trigger):
       • Major life events–death/bereavement, divorce/separation, job loss, financial crisis
       • Work stress–deadline pressure, job insecurity, conflict, excessive workload
       • Relationship stress–marital discord, family conflict
       • Health stress–new diagnosis, chronic illness, pain
       • Positive stressors–new baby, wedding, moving, promotion
     • Medical conditions:
       • Pain (→ UC-4)–chronic pain conditions disrupting sleep (arthritis, back pain, headaches)
       • Cardiac–heart failure (orthopnea, paroxysmal nocturnal dyspnea)
       • Respiratory–COPD, asthma (nocturnal dyspnea, cough)
       • Gastrointestinal–GERD (nocturnal reflux waking patient)
       • Urological–nocturia (waking to urinate multiple times)
       • Endocrine–hyperthyroidism, diabetes (nocturia, hypoglycemia)
     • Medications and substances:
       • Caffeine–coffee, tea, energy drinks (late afternoon/evening consumption)
       • Stimulant medications–decongestants, bronchodilators, ADHD medications
       • Antidepressants–SSRIs, bupropion (activating)
       • Steroids–prednisone (activating, especially if evening dose)
       • Beta-blockers–nightmares, sleep disruption (lipophilic types)
       • Diuretics–nocturia if evening dose
       • Alcohol–initial sedation but disrupts sleep architecture, rebound awakening
       • Nicotine–stimulant effect, withdrawal during night
     • Sleep disorders:
       • Obstructive sleep apnea (OSA)–snoring, witnessed apneas, gasping, obesity, hypertension†
       • Restless legs syndrome–uncomfortable leg sensations, urge to move, worse evening/night
       • Periodic limb movement disorder–repetitive leg movements during sleep
       • Narcolepsy–excessive daytime sleepiness, cataplexy, sleep paralysis†
       • Circadian rhythm disorders–shift work, jet lag, delayed/advanced sleep phase
     • Psychiatric disorders:
       • Depression–early morning awakening classic (also sleep maintenance insomnia, hypersomnia)
       • Anxiety–sleep onset insomnia, racing thoughts, hyperarousal
       • PTSD–nightmares, hypervigilance, sleep avoidance
       • Bipolar disorder–decreased need for sleep during mania
     • Environmental factors:
       • Bedroom–noise, light, temperature (too warm/cold), uncomfortable bed
       • Bed partner–snoring partner, restless partner, different sleep schedules
       • Shift work–rotating shifts, night shifts disrupting circadian rhythm
       • Jet lag–time zone changes
  2. Asks about aggravating factors–what makes sleep disturbances worse
     • “What makes the sleep problem worse?”
     • Poor sleep hygiene:
       • Irregular sleep schedule–variable bedtime/wake time, weekend oversleeping
       • Excessive time in bed–staying in bed when can’t sleep (conditioned arousal)
       • Daytime napping–long naps (>30 min) or late afternoon naps
       • Evening activities–vigorous exercise <3 hours before bed, heavy meals before bed
       • Bedroom environment–watching TV in bed, working in bed, bright lights
       • Clock watching–checking time repeatedly when can’t sleep (increases anxiety)
     • Stimulant use:
       • Caffeine–afternoon/evening consumption, high total daily intake
       • Nicotine–smoking before bed, withdrawal during night
     • Alcohol:
       • Evening drinking–initial sedation but disrupts sleep architecture, rebound awakening at 3-4 AM
     • Mental factors:
       • Worry about sleep–performance anxiety about sleeping (“I must sleep tonight”)
       • Stress–ongoing stressors, rumination, racing thoughts
       • Arousal in bedroom–bed associated with wakefulness rather than sleep
     • Medical worsening:
       • Pain–undertreated pain, breakthrough pain at night
       • Nocturia–increasing urinary frequency
       • GERD–large meals, lying flat
       • Dyspnea–worsening heart failure, COPD exacerbation
       • Weight gain–worsening sleep apnea
     • Technology:
       • Screen time before bed–blue light suppressing melatonin, stimulating content
       • Phone in bedroom–notifications, temptation to check
  3. Asks about maintaining factors–what perpetuates sleep disturbances
     • “What seems to be keeping the sleep problem going?”
     • Behavioral perpetuating factors (psychophysiologic insomnia):
       • Conditioned arousal–bed/bedroom associated with wakefulness and frustration
       • Maladaptive sleep effort–trying too hard to sleep (creates anxiety, arousal)
       • Excessive time in bed–staying in bed when can’t sleep, sleeping in to compensate
       • Irregular schedule–no consistent sleep-wake routine
       • Daytime napping–reducing sleep drive for nighttime
     • Cognitive perpetuating factors:
       • Worry about sleep–catastrophizing (“I’ll never sleep,” “I’ll be exhausted tomorrow”)
       • Hyperarousal–heightened mental and physiological arousal at night
       • Maladaptive beliefs–”I need 8 hours or I can’t function”
     • Medication-related:
       • Chronic hypnotic use–tolerance, dependence, rebound insomnia
       • Inadequate treatment–undertreated pain, depression, anxiety
     • Untreated sleep disorders:
       • Undiagnosed sleep apnea–ongoing untreated OSA
       • Restless legs syndrome–inadequate treatment
     • Untreated medical conditions:
       • Chronic pain–ongoing inadequate pain control
       • Depression–untreated or undertreated
       • Anxiety–ongoing untreated anxiety disorder
       • GERD–inadequate acid suppression
  4. Asks about relieving factors–what makes sleep disturbances better
     • “Has anything made the sleep problem better?”
     • Sleep hygiene improvements:
       • Consistent schedule–same bedtime/wake time daily (including weekends)
       • Bedroom optimization–cool (60-67°F/15-19°C), dark, quiet, comfortable
       • Bed for sleep only–not for TV, work, worrying
       • Stimulus control–leave bedroom if can’t sleep >20 minutes
       • Limiting time in bed–sleep restriction therapy (increases sleep drive)
       • Avoiding naps–or limiting to <30 min before 2 PM
       • Morning light exposure–helps regulate circadian rhythm
     • Behavioral changes:
       • Evening routine–relaxing pre-sleep ritual, wind-down period
       • Avoiding caffeine–none after noon (or earlier if sensitive)
       • Avoiding alcohol–especially within 3-4 hours of bedtime
       • Exercise–regular exercise but not within 3 hours of bedtime
       • Avoiding large meals–light evening meal, no heavy food before bed
     • Cognitive techniques:
       • Relaxation–progressive muscle relaxation, diaphragmatic breathing
       • Meditation–mindfulness meditation, body scan
       • Cognitive restructuring–challenging maladaptive sleep beliefs
       • Worry time–designated time earlier in day for problem-solving
     • Medical treatments:
       • Treating underlying conditions–pain, depression, anxiety, GERD, nocturia
       • CPAP therapy–for sleep apnea (highly effective if adherent)
       • Medications for insomnia–short-term use only (benzodiazepines, Z-drugs, melatonin)
     • Cognitive behavioral therapy for insomnia (CBT-I):
       • First-line treatment for chronic insomnia (evidence-based, superior to medications long-term)
       • Components–sleep restriction, stimulus control, cognitive therapy, relaxation, sleep hygiene
     • “Nothing helps”:
       • Consider underlying untreated condition (depression, sleep apnea, restless legs)
       • May need formal sleep study
       • May need specialist referral (sleep medicine, psychiatry)

• 9.4Accompanying Symptoms & Circumstances Heuristic

  1. Asks about accompanying symptoms–associated symptoms for differential diagnosis
     • “What other symptoms are you experiencing with the sleep problem?”
     • Sleep apnea symptoms (OSA screening essential):
       • Loud snoring–reported by bed partner
       • Witnessed apneas–bed partner observes breathing pauses†
       • Gasping/choking–waking up gasping for air, feeling like choking†
       • Morning headaches–dull headache upon waking (CO2 retention, hypoxia)
       • Dry mouth–mouth breathing during sleep
       • Excessive daytime sleepiness–despite adequate time in bed†
       • Nocturia–waking frequently to urinate
       • Unrefreshing sleep–never feel rested despite hours in bed
     • STOP-BANG Questionnaire (validated OSA screening)†:
       • Snoring–loud snoring?
       • Tired–daytime tiredness?
       • Observed–witnessed apneas?
       • Pressure–hypertension?
       • BMI >35 kg/m²
       • Age >50
       • Neck circumference >40 cm (16 inches)
       • Gender–male
       • Score ≥3: High risk for OSA†
     • Constitutional symptoms:
       • Fatigue (→ UC-2)–persistent tiredness despite adequate sleep time
       • Weight changes (→ UC-3)–weight gain worsening sleep apnea, weight loss with depression/malignancy
     • Mood/psychiatric symptoms:
       • Depressed mood–sadness, anhedonia, hopelessness (early morning awakening classic for depression)
       • Anxiety–worry, tension, panic attacks (sleep onset insomnia classic for anxiety)
       • Irritability–short temper, frustration (sleep deprivation effect)
       • Suicidal thoughts–depression with insomnia†
       • Manic symptoms–decreased need for sleep, hyperactivity, racing thoughts (bipolar disorder)†
     • Restless legs syndrome symptoms:
       • Uncomfortable leg sensations–crawling, tingling, aching, “creepy-crawly”
       • Urge to move legs–compelling need to move, relief with movement
       • Worse at rest–symptoms emerge when sitting/lying still
       • Worse evening/night–circadian pattern, worse before sleep
       • Relief with movement–walking, stretching provides temporary relief
     • Cardiovascular symptoms:
       • Orthopnea (→ CV-3, R-1)–dyspnea when lying flat (heart failure)
       • Paroxysmal nocturnal dyspnea–waking with severe dyspnea (heart failure)†
       • Edema (→ CV-3)–lower extremity swelling (heart failure)
       • Hypertension–OSA is common cause of resistant hypertension
     • Respiratory symptoms:
       • Dyspnea (→ R-1)–shortness of breath at rest or with exertion
       • Cough (→ R-2)–nocturnal cough (asthma, GERD, heart failure, COPD)
     • Neurological symptoms:
       • Headache (→ N-1)–morning headaches (sleep apnea, hypertension, sleep deprivation)
       • Cataplexy–sudden muscle weakness with emotion (narcolepsy)†
       • Sleep paralysis–brief paralysis on waking/falling asleep (narcolepsy)
       • Hypnagogic hallucinations–vivid hallucinations when falling asleep (narcolepsy)
     • Genitourinary symptoms:
       • Nocturia (→ GU-2)–waking to urinate (≥2 times abnormal)
     • Pain symptoms:
       • Chronic pain (→ UC-4)–arthritis, fibromyalgia, back pain, neuropathy disrupting sleep
     • Other symptoms:
       • Night sweats (→ UC-6)–drenching sweats (infection, malignancy, menopause)
       • Hot flashes–menopause (vasomotor symptoms disrupting sleep)
  2. Asks about life circumstances–medical history and context
     • “Tell me about your medical history and sleep environment.”
     • Previous sleep history:
       • Childhood sleep problems–lifelong pattern, primary sleep disorder
       • Prior sleep studies–results, diagnoses (OSA, restless legs, narcolepsy)
       • Prior treatments–CPAP (adherence?), medications, CBT-I
     • Chronic medical conditions:
       • Cardiovascular–heart failure (orthopnea, PND), hypertension
       • Pulmonary–COPD, asthma (nocturnal symptoms)
       • Neurological–Parkinson’s, stroke, dementia, neuropathy
       • Psychiatric–depression, anxiety, PTSD, bipolar disorder
       • Endocrine–diabetes (nocturia, hypoglycemia), hyperthyroidism
       • Rheumatologic–rheumatoid arthritis, fibromyalgia, chronic pain syndromes
     • Sleep apnea risk factors:
       • Obesity–BMI >30 kg/m², especially BMI >35†
       • Male sex–2-3x higher risk than women (premenopausal)
       • Age–increasing risk with age
       • Neck circumference–>16 inches (40 cm) in women, >17 inches (43 cm) in men
       • Alcohol use–relaxes upper airway muscles
     • Psychiatric history:
       • Depression–current or past, treatment status
       • Anxiety disorders–GAD, panic disorder, social anxiety
       • PTSD–trauma history, nightmares, hypervigilance
       • Bipolar disorder–manic episodes with decreased sleep need
     • Medications:
       • Complete medication list
       • Sleep medications–type, duration of use, effectiveness, side effects
       • Stimulating medications–SSRIs, bupropion, stimulants, steroids, decongestants
       • Medications causing nocturia–diuretics (timing of dose)
       • Caffeine intake–cups per day, timing of last caffeine
     • Substance use:
       • Alcohol–quantity, frequency, evening use
       • Tobacco–smoking (OSA risk factor, stimulant)
       • Caffeine–coffee, tea, energy drinks (amount, timing)
     • Occupational factors:
       • Shift work–night shifts, rotating shifts (circadian disruption)
       • Work stress–deadlines, job insecurity, high-pressure job
       • Work hours–long hours, on-call, irregular schedule
     • Social context:
       • Living situation–alone, with partner, with children
       • Bed partner–partner snoring, restless, different schedule
       • Caregiving–caring for children, elderly parents, ill family member
       • Recent life changes–new baby, divorce, moving, bereavement, job change
     • Sleep environment:
       • Bedroom–temperature, noise level, light exposure, comfort
       • Bed/mattress–quality, age, comfort
       • Technology–TV in bedroom, phone/tablet use in bed
       • Pets–pets in bed/bedroom disrupting sleep

• 9.5Red Flags & Interconnectedness

  Red Flags–Require immediate or urgent evaluation

  Emergency presentations

  • Excessive daytime sleepiness + falling asleep while driving–immediate driving prohibition, urgent sleep evaluation†
  • Sleep disturbance + suicidal ideation–psychiatric emergency, suicide risk assessment†
  • Sleep disturbance + acute confusion + fever–delirium, CNS infection, severe illness†
  • Sleep disturbance + severe dyspnea + orthopnea–acute heart failure, pulmonary edema†
  • Sudden onset excessive sleepiness + cataplexy–narcolepsy, urgent neurology evaluation†
  • Witnessed apneas + severe daytime sleepiness + oxygen desaturation–severe OSA, urgent sleep study†

  High-risk presentations

  • Loud snoring + witnessed apneas + severe daytime sleepiness + hypertension–obstructive sleep apnea (cardiovascular risk, urgent sleep study)†
  • STOP-BANG ≥5–very high OSA risk†
  • Sleep disturbance + depression + suicidal thoughts–suicide risk increased with insomnia†
  • Excessive daytime sleepiness + falling asleep in active situations–severe sleep disorder, safety risk†
  • Sleep disturbance + bipolar disorder + decreased need for sleep–manic episode†
  • Sleep disturbance + weight loss + night sweats + cough–TB, lymphoma, serious systemic illness†
  • Sleep disturbance + morning headaches + confusion + personality changes–sleep apnea with severe hypoxia, CO2 retention†
  • Sleep disturbance + restless legs + anemia–iron deficiency anemia causing/worsening RLS†
  • Insomnia + chest pain + dyspnea–cardiac ischemia, heart failure†
  • Sleep disturbance + chronic opioid use + witnessed apneas–central sleep apnea from opioids†
  • Elderly + new sleep disturbance + confusion–delirium, dementia, medication side effect, medical illness†
  • Child + snoring + witnessed apneas + behavioral problems–pediatric OSA (adenotonsillar hypertrophy)†

  Interconnectedness

  Obstructive sleep apnea classic presentation

  • Loud snoring + witnessed apneas + excessive daytime sleepiness + morning headaches + obesity + hypertension†
  • Screening: STOP-BANG questionnaire (≥3 high risk, ≥5 very high risk)†
  • Workup: Sleep study (polysomnography or home sleep apnea test)
  • AHI (Apnea-Hypopnea Index): <5 normal, 5-15 mild, 15-30 moderate, >30 severe
  • Treatment: CPAP (first-line), weight loss, positional therapy, oral appliance
  • Complications untreated: Hypertension, stroke, MI, heart failure, arrhythmia, sudden cardiac death†

  Depression and sleep

  • Insomnia (especially early morning awakening) + depressed mood + anhedonia + fatigue + weight changes + suicidal thoughts†
  • Early morning awakening classic for depression (terminal insomnia)
  • Screening: PHQ-9 depression questionnaire
  • Hypersomnia also possible (atypical depression)

  Anxiety and sleep

  • Sleep onset insomnia + racing thoughts + worry + physical anxiety symptoms + panic attacks
  • Screening: GAD-7 anxiety questionnaire
  • Treatment: CBT-I, CBT for anxiety, SSRIs, relaxation techniques

  Heart failure and sleep

  • Sleep disturbance + orthopnea + paroxysmal nocturnal dyspnea + dyspnea on exertion + edema†
  • Orthopnea: Number of pillows needed
  • PND: Waking gasping for air†
  • Cheyne-Stokes respiration: Central sleep apnea pattern in heart failure

  Restless legs syndrome

  • Sleep onset insomnia + uncomfortable leg sensations + urge to move + relief with movement + worse evening/night + iron deficiency
  • Workup: Iron studies (ferritin <75 μg/L treat even if not anemic)
  • Treatment: Iron supplementation, dopamine agonists, gabapentin, pregabalin

  Narcolepsy

  • Excessive daytime sleepiness + cataplexy (sudden muscle weakness with emotion) + sleep paralysis + hypnagogic hallucinations†
  • Cataplexy: Pathognomonic for narcolepsy
  • Workup: Sleep study with MSLT (Multiple Sleep Latency Test)
  • Treatment: Modafinil, armodafinil, sodium oxybate; neurology referral

  Complaint patterns

  • Obese middle-aged man + loud snoring + witnessed apneas + morning headaches + resistant hypertension + BMI >35–severe OSA (CPAP therapy, weight loss)†
  • Woman age 50 + sleep onset insomnia + hot flashes + night sweats + irritability–menopausal insomnia (HRT if no contraindications)
  • Young adult + cannot fall asleep until 2-4 AM + extreme difficulty waking for morning obligations–delayed sleep phase disorder (chronotherapy, morning bright light)
  • Elderly + early bedtime (8 PM) + waking 4 AM unable to return to sleep–advanced sleep phase disorder (evening bright light)
  • Patient on opioids + central apneas + irregular breathing + poor sleep quality–opioid-induced central sleep apnea†
  • Patient + uncomfortable legs + urge to move + worse at night + ferritin <50 μg/L–restless legs syndrome with iron deficiency (iron supplementation)
  • Depressed patient + early morning awakening 3-4 AM + unable to return to sleep + hopelessness–depression with terminal insomnia (antidepressant therapy)
  • Anxious patient + lying awake 2+ hours + racing thoughts + worry + hyperarousal–anxiety-related sleep onset insomnia (CBT-I, relaxation techniques)
  • Chronic insomnia patient + trying very hard to sleep + clock watching + frustrated in bed–psychophysiologic insomnia (CBT-I with stimulus control)
  • Young adult + excessive sleepiness + sudden knee buckling when laughing + sleep paralysis–narcolepsy with cataplexy (neurology referral, sleep study)†
  • Night shift worker + can’t sleep during day + excessive sleepiness at work + near-miss accidents–shift work disorder
  • Patient with heart failure + orthopnea + PND + Cheyne-Stokes breathing + central apneas–heart failure with central sleep apnea†
  • PTSD patient + nightmares + sleep avoidance + hypervigilance + trauma history–PTSD-related sleep disturbance (trauma therapy, prazosin)

10CARDIOVASCULAR SYSTEM

11--Chest Pain

• 11.1Complaint Heuristic

  1. Asks about the nature of chest pain
     • “What does the pain feel like?”
     • Cardiac-type pain:
       • Pressure, squeezing, tightness, heaviness, constriction
       • “Elephant sitting on chest,” “tight band,” “vise-like”
       • Crushing sensation, dull ache
       • Burning–can mimic heartburn
       • Does NOT change with breathing
     • Pleuritic pain (pulmonary/pleural):
       • Sharp, stabbing, knife-like, piercing
       • “Catches my breath” with inspiration
       • Worse with deep breathing, coughing, movement
     • Other pain qualities:
       • Tearing, ripping–aortic dissection†
       • Positional–worse lying down, better sitting forward–pericarditis
       • Burning–GERD, esophagitis
       • Aching, soreness–musculoskeletal, chest wall
     • Pattern:
       • Constant, unrelenting–MI, dissection, pneumothorax†
       • Intermittent, episodic–stable angina, GERD, musculoskeletal
       • Crescendo–starts mild, rapidly intensifies–unstable angina, MI†
  2. Asks about the intensity of chest pain
     • “How severe is the pain?”
     • Functional impact:
       • Severe: completely incapacitating, extreme distress–MI, dissection, PE†
       • Moderate: must stop activity, sit or rest–angina, moderate pleuritic pain
       • Mild: can continue activities, minimal interruption
     • Behavioral indicators:
       • Diaphoresis (profuse sweating)–classic for MI†
       • Nausea, vomiting–especially inferior MI†
       • Lightheadedness, near-syncope†
       • Distressed appearance, clutching chest, pale
     • Pain scale:
       • 8-10/10: suggests life-threatening cause–MI, aortic dissection, PE, pneumothorax†
       • 5-7/10: typical angina, moderate pneumonia, significant musculoskeletal
       • 2-4/10: mild angina, GERD, minor musculoskeletal
     • Diabetics and elderly: may have atypical/minimal pain despite severe ischemia†
  3. Asks about localization–where is the chest pain
     • “Where exactly is the pain? Can you point to it?”
     • Can point with one finger (suggests pleuritic/chest wall):
       • Localized to specific spot–pleural irritation, costochondritis, rib fracture
       • Left lateral chest–pleuritic, musculoskeletal
       • Right-sided chest–pleuritic, biliary, musculoskeletal
     • Cannot pinpoint / diffuse (suggests cardiac):
       • Substernal (retrosternal)–typical for cardiac, GERD, esophagitis
       • Central chest–cardiac, esophageal, aortic
       • Diffuse, large area (fist-sized or larger)–typical for cardiac ischemia
     • Specific locations:
       • Posterior chest, interscapular–MI (especially inferior), aortic dissection†
       • Epigastric (upper abdomen)–inferior MI, GERD, biliary, peptic ulcer
     • Depth:
       • Deep, visceral sensation–cardiac, aortic, esophageal
       • Superficial, on chest wall–musculoskeletal, skin (shingles)
  4. Asks about shifts and radiation–where does pain spread
     • “Does the pain spread anywhere else?”
     • Classic cardiac radiation (HIGH SPECIFICITY for ACS):
       • Left arm–especially inner aspect, down to hand†
       • Jaw, teeth–mandibular pain, toothache sensation†
       • Neck, throat–choking sensation†
       • Left shoulder†
       • Back, interscapular–between shoulder blades
       • Epigastrium–upper abdomen (inferior MI)
     • Pleuritic pain radiation:
       • Shoulder tip–diaphragmatic irritation (phrenic nerve C3-C4-C5)
       • Ipsilateral chest wall–following dermatomal distribution
       • Does NOT radiate to arm, jaw, neck
     • Migration patterns:
       • Aortic dissection: starts chest, migrates to back, descends down spine†
       • Fixed location throughout episode–typical for most etiologies
     • Pericarditis radiation:
       • Shoulders (trapezius ridge)–bilateral shoulder pain

• 11.2Time-Intensity Heuristic

  1. Asks about onset–when chest pain started
     • “When did the pain start, and how did it come on?”
     • Sudden, abrupt onset (seconds to minutes)–HIGHEST CONCERN:
       • Acute MI–can be sudden or crescendo†
       • Aortic dissection–sudden, maximal intensity at onset†
       • Pulmonary embolism–sudden pleuritic pain†
       • Pneumothorax–sudden unilateral pleuritic pain†
     • Rapid onset (minutes to hours):
       • Unstable angina†
       • Pericarditis
       • Pneumonia–pleuritic pain develops over hours
     • Gradual onset (hours to days):
       • Stable angina worsening
       • Costochondritis
       • GERD
     • Precipitating event:
       • Exertion, physical activity–stable angina, unstable if at rest†
       • Emotional stress, anger, anxiety–can trigger cardiac ischemia
       • At rest or during sleep–unstable angina, MI†
       • After trauma–rib fracture, pneumothorax, cardiac contusion†
  2. Asks about course over time–evolution since onset
     • “How long does the pain last, and how has it changed?”
     • Duration of episodes:
       • Stable angina: 5-15 minutes, relieved by rest or nitroglycerin
       • Unstable angina: >20 minutes, not promptly relieved†
       • Acute MI: >20-30 minutes, often hours, unrelenting†
       • Aortic dissection: immediate maximum intensity, persistent†
       • Pericarditis: continuous for hours to days
     • Progression:
       • Improving–pain decreasing, responding to treatment
       • Stable–same intensity, not improving–ongoing ischemia†
       • Worsening–escalating pain–progression of MI, expanding dissection†
       • Crescendo pattern–rapid intensification over minutes†
     • Frequency:
       • First episode ever–new-onset angina, first MI
       • Increasing frequency of episodes–unstable angina, crescendo angina†
       • Same frequency as before–stable angina
       • Chronic daily pain–unlikely cardiac, consider GERD, musculoskeletal
  3. Asks about course during day–pattern over 24 hours
     • “Does the pain change throughout the day or with position?”
     • Timing patterns:
       • Exertional–occurs with activity, relieves with rest–stable angina
       • Rest pain–unstable angina, MI†
       • Nocturnal (wakes from sleep)–unstable angina, MI, Prinzmetal’s angina†
       • Post-prandial (after eating)–angina from increased demand, GERD
     • Positional influences:
       • Cardiac ischemia–typically NO positional change
       • Pleuritic–worse lying flat, better sitting upright
       • Pericarditis–worse lying flat, better sitting up and leaning forward
       • GERD–worse lying flat, better sitting up
       • Musculoskeletal–worse with certain positions or movements
  4. Asks about frequency–pattern of chest pain episodes
     • “How often do you get this pain?”
     • Episode frequency:
       • First episode ever–new-onset, requires full workup
       • Increasing frequency–unstable angina, crescendo pattern†
       • Stable pattern for months/years–stable angina
       • Daily or near-daily–unlikely cardiac, consider GERD, musculoskeletal
     • Comparison to prior episodes:
       • Same as previous–stable pattern
       • More severe than prior–unstable angina, progression†
       • Occurring at lower exertion threshold–unstable angina†
       • Similar to previous MI–high concern for recurrent ACS†

• 11.3Triggering & Modifying Heuristic

  1. Asks about triggering factors–what initiated the chest pain
     • “What do you think brought on the chest pain?”
     • Cardiac triggers:
       • Exertion, physical activity–stable angina: predictable threshold
       • At rest or minimal exertion–unstable angina, MI†
       • Emotional stress, anger, anxiety–can trigger cardiac ischemia
       • Cold exposure–coronary vasoconstriction
       • After large meal–increased cardiac demand
     • Pleuritic/pulmonary triggers:
       • After trauma–rib fracture, pneumothorax, pulmonary contusion†
       • After vigorous coughing–spontaneous pneumothorax, rib strain
       • With fever/illness–pneumonia, pleuritis
     • Other triggers:
       • After heavy lifting/strain–musculoskeletal, aortic dissection†
       • No clear precipitant–MI, PE, spontaneous pneumothorax†
       • Cocaine, methamphetamine use–coronary vasospasm, MI risk†
     • Risk factors for PE:
       • Recent surgery–especially orthopedic, abdominal, pelvic†
       • Immobilization–prolonged travel, bed rest, hospitalization†
       • Malignancy–active cancer, chemotherapy†
       • Pregnancy/postpartum†
       • Oral contraceptives, hormone therapy†
  2. Asks about aggravating factors–what makes chest pain worse
     • “What makes the pain worse?”
     • Physical activity:
       • Exertion–worsens cardiac ischemia, pleuritic pain
       • Continued activity despite pain–worsens ischemia
     • Respiratory:
       • Deep breathing, coughing, sneezing–worsens pleuritic pain (DEFINING FEATURE)
       • Talking–worsens pleuritic pain
     • Positional:
       • Lying flat–worsens GERD, pericarditis, pleuritic pain
       • Bending, twisting, reaching–worsens musculoskeletal pain
     • Physical pressure:
       • Palpation, pressure on chest wall–worsens musculoskeletal (costochondritis, rib fracture)
       • Cardiac pain–NOT reproducible with palpation
     • Other:
       • Cold air exposure–worsens cardiac ischemia
       • Eating–large meals worsen angina, GERD
       • Swallowing–worsens esophageal pain
  3. Asks about maintaining factors–what perpetuates chest pain
     • “Why do you think the pain continues?”
     • Ongoing cardiac ischemia:
       • Continued activity despite pain
       • Inadequate anti-anginal medication
       • Non-compliance with cardiac medications–especially antiplatelet after stents
       • Uncontrolled risk factors–hypertension, diabetes, hyperlipidemia
     • Ongoing pleural/pulmonary disease:
       • Untreated infection–pneumonia, empyema
       • Persistent pneumothorax–not re-expanded
       • Untreated PE–no anticoagulation
     • Lifestyle factors:
       • Continued smoking
       • Cocaine/stimulant use
       • Unmanaged stress
     • Medical factors:
       • Anemia–reduced oxygen delivery to heart
       • Hyperthyroidism, tachyarrhythmias–increased cardiac demand
       • Heart failure–reduced cardiac output
  4. Asks about relieving factors–what makes chest pain better
     • “What helps the pain?”
     • Rest:
       • Stable angina–relieved within 5-10 minutes with rest (CLASSIC)
       • Unstable angina/MI–may NOT be relieved by rest†
       • Pleuritic–helps by reducing respiratory rate
     • Nitroglycerin (sublingual):
       • Angina–relief within 1-5 minutes (CLASSIC response)
       • MI–partial or no relief despite multiple doses†
       • Esophageal spasm–can also respond (CONFOUNDING)
     • Position changes:
       • Sitting up–relieves GERD, pericarditis, pleuritic pain
       • Leaning forward–relieves pericarditis
       • Shallow breathing–relieves pleuritic pain
     • Other medications:
       • NSAIDs–pleuritis, pericarditis, musculoskeletal relief
       • Antacids, PPIs–GERD relief
     • CRITICAL: Lack of response to nitroglycerin does NOT rule out cardiac cause†

• 11.4Accompanying Symptoms & Circumstances Heuristic

  1. Asks about accompanying symptoms–associated symptoms for differential diagnosis
     • “What other symptoms do you have with the chest pain?”
     • Cardiovascular symptoms:
       • Dyspnea–classic for ACS, heart failure, PE, pneumothorax, pneumonia†
       • Palpitations–arrhythmia, MI with arrhythmia, anxiety, PE†
       • Syncope or presyncope–massive MI, malignant arrhythmia, PE, aortic dissection†
       • Diaphoresis (profuse sweating)–CLASSIC for MI, PE†
       • Unilateral leg swelling–DVT → PE risk†
     • Gastrointestinal symptoms:
       • Nausea & vomiting–CLASSIC for inferior MI†
       • Heartburn, reflux–GERD, can mimic cardiac pain
       • Dysphagia–esophageal spasm, esophagitis
       • Epigastric pain–inferior MI, GERD, biliary colic
     • Respiratory symptoms:
       • Cough–pneumonia, pleuritis, PE
       • Hemoptysis–PE with infarction, pneumonia†
       • Wheezing–asthma, COPD, heart failure
     • Systemic symptoms:
       • Fever–pneumonia, pericarditis, endocarditis, myocarditis†
       • Weight loss–malignancy, TB
       • Night sweats–TB, lymphoma, endocarditis
     • Neurological symptoms:
       • Altered mental status–cardiogenic shock, hypoxia†
       • Focal neurological deficits–aortic dissection with carotid involvement†
  2. Asks about life circumstances–social and occupational context
     • “How does your daily life affect your symptoms?”
     • Occupation:
       • Physical demands of work–heavy labor (cardiac demand)
       • Sedentary vs. active job
       • Stress level–psychosocial stressors
       • Asbestos exposure–mesothelioma, asbestosis
     • Travel & immobility:
       • Recent long-distance travel–flights >4 hours, long car rides–PE risk†
       • Prolonged immobility–bed rest, cast, wheelchair–PE risk†
     • Exercise & activity:
       • Baseline exercise tolerance–what activities trigger symptoms
       • Recent changes in activity level–deconditioning
     • Psychosocial:
       • Anxiety, depression–can lower anginal threshold, affect medication compliance
       • Financial stress–medication adherence barriers
     • Safety concerns:
       • Driving with chest pain–syncope risk†
       • Living alone–delayed help if emergency

• 11.5Red Flags & Interconnectedness

  Red Flags–Require immediate or urgent evaluation

  Emergency presentations

  • Crushing substernal pressure + radiation to left arm/jaw + diaphoresis + nausea†
  • Sudden severe tearing chest pain radiating to back + unequal blood pressures in arms†
  • Sudden pleuritic chest pain + dyspnea + unilateral leg swelling + tachycardia†
  • Sudden unilateral pleuritic chest pain + dyspnea + decreased breath sounds†
  • Chest pain + syncope†
  • Chest pain + hypotension/shock†

  High-risk presentations

  • Chest pain + unequal blood pressures in arms (>20 mmHg difference)†
  • Chest pain + new heart murmur†
  • Chest pain + altered mental status†
  • Chest pain unrelieved by nitroglycerin + ongoing†
  • Rest pain or pain at minimal exertion in patient with cardiac risk factors†
  • Increasing frequency of anginal episodes†

  Age-specific red flags

  • Diabetics + elderly: atypical/minimal pain despite severe ischemia†
  • Young patient + cocaine/stimulant use + chest pain†

  Risk factor red flags

  • Recent surgery + immobilization + sudden pleuritic chest pain–PE†
  • Active malignancy + sudden dyspnea + chest pain–PE†
  • Marfan syndrome or connective tissue disease + sudden tearing pain–dissection†

  Interconnectedness

  Not to be missed

  • Acute Coronary Syndrome (ACS): substernal pressure + radiation to arm/jaw + diaphoresis + nausea + not relieved by rest

  Complaint patterns

  • Aortic dissection: sudden severe tearing pain + radiates to back + migrates as dissection progresses + unequal BP in arms
  • Pulmonary embolism: sudden pleuritic pain + dyspnea + tachycardia + unilateral leg swelling + risk factors (surgery, immobility, malignancy)
  • Pneumothorax: sudden unilateral pleuritic pain + dyspnea + decreased breath sounds + tall thin young male or COPD
  • Pericarditis: sharp positional pain + worse lying down + better sitting forward + friction rub + recent viral illness
  • Pneumonia: pleuritic pain + fever + productive cough + dyspnea
  • Stable angina: predictable substernal pressure with exertion + relieved by rest within 5-10 minutes + relieved by nitroglycerin
  • GERD: substernal burning + worse after meals + worse lying down + relieved by antacids + no radiation to arm/jaw
  • Costochondritis: chest wall tenderness + reproducible with palpation + worse with movement + no systemic symptoms

  Specific syndrome patterns

  • Middle-aged man + substernal pressure + radiation to left arm + diaphoresis + nausea + risk factors–ACS
  • Hypertensive patient + sudden tearing chest pain + radiates to back + pulse deficit–aortic dissection
  • Post-operative patient + sudden pleuritic pain + dyspnea + tachycardia + hypoxia–PE
  • Tall thin young male + sudden unilateral chest pain + dyspnea + absent breath sounds–pneumothorax
  • Young patient after viral illness + sharp chest pain + worse lying down + better leaning forward–pericarditis
  • Patient with fever + pleuritic pain + productive cough + consolidation on exam–pneumonia
  • Patient + reproducible chest wall tenderness + no fever + no dyspnea–costochondritis
  • Young patient + cocaine use + substernal chest pain + diaphoresis–cocaine-induced MI

12--Palpitations

• 12.1Complaint Heuristic

  1. Asks about the nature of palpitations
     • “What do your palpitations feel like?”
     • Rhythm pattern:
       • Regular, fast–”racing heart,” “pounding heart”–sinus tachycardia, SVT, atrial flutter, ventricular tachycardia
       • Completely irregular–atrial fibrillation
       • Intermittent irregularity–premature beats (PACs, PVCs)
       • Fluttering–rapid, fine sensation–SVT, atrial flutter, anxiety
       • Flip-flopping/skipped beats–sensation of heart “stopping” then resuming–premature beats with compensatory pause
       • Pounding/forceful–strong heartbeats, often felt in neck–anxiety, hyperthyroidism, anemia
       • Slow but noticeable–awareness of slow, forceful beats–bradycardia, heart block
     • Patient descriptions:
       • “Heart is racing”
       • “Heart is pounding out of my chest”
       • “Heart is skipping beats”
       • “Heart flutters”
       • “Can feel my heart in my throat/neck”
       • “Heart pauses then pounds hard”
     • Rhythm tapping:
       • Ask patient to tap out the rhythm–helps identify regular vs. irregular pattern
       • Can distinguish rapid regular (SVT) from completely irregular (AFib)
  2. Asks about the intensity of palpitations
     • “How severe are the palpitations? How are they affecting you?”
     • Functional impact:
       • Mild–barely noticeable, doesn’t interrupt activities
       • Moderate–definitely noticeable, distracting, causes concern
       • Severe–distressing, incapacitating, causes significant anxiety
       • Critical–associated with hemodynamic compromise (syncope, near-syncope, chest pain, severe dyspnea)†
     • Behavioral indicators:
       • Can continue normal activities
       • Must stop and wait for it to pass
       • Avoids activities that trigger episodes
       • Cannot function during episodes†
     • Comparison to previous:
       • Same as usual
       • More intense than before†
       • First episode ever
  3. Asks about localization–where palpitations are felt
     • “Where do you feel the palpitations?”
     • Location:
       • Chest (precordial)–most common location–central, left-sided, diffuse
       • Neck/throat–often with forceful beats–”frog sign” visible neck pulsations (suggests AV dissociation)†
       • Epigastric–upper abdomen–can be referred cardiac sensation
       • Head–sensation of pulsing–high-output states, anxiety
     • Radiation:
       • Usually localized to chest
       • May feel throughout body with forceful beats
       • Neck pulsations accompanying chest palpitations
  4. Asks about shifts and radiation–changes in pattern over time
     • “Has the pattern of palpitations changed over time?”
     • Migration patterns (temporal):
       • Episodes becoming more frequent†
       • Episodes becoming longer†
       • Episodes becoming more symptomatic†
       • New symptoms developing with episodes†
       • Previously regular now irregular (or vice versa)
       • Started as occasional, now daily
       • Started as seconds, now minutes to hours
       • Started without symptoms, now with dizziness†

• 12.2Time-Intensity Heuristic

  1. Asks about onset–when palpitations started
     • “When did the palpitations start, and how did they come on?”
     • Timing:
       • Sudden onset and offset (paroxysmal)–”like a switch”–reentrant arrhythmia (SVT, atrial flutter, paroxysmal AFib)†
       • Gradual onset–sinus tachycardia, anxiety, hyperthyroidism
       • Insidious awareness–persistent atrial fibrillation, chronic awareness in anxiety
     • Physical triggers:
       • Exertion, exercise
       • Post-exertional–more concerning than during†
       • Bending over, lying down–vagal maneuvers can trigger or terminate
       • After heavy meal
     • Situational triggers:
       • Emotional stress, anxiety, anger
       • Fever, illness
       • Dehydration
       • Sleep deprivation
       • Standing up–POTS, orthostatic
     • Substance triggers:
       • Caffeine–coffee, energy drinks, tea
       • Alcohol–holiday heart syndrome
       • Cocaine, amphetamines, methamphetamine†
       • Nicotine–smoking, vaping
       • Decongestants–pseudoephedrine
     • No identifiable trigger:
       • Paroxysmal arrhythmias can occur without clear trigger
       • More concerning if occurring at rest without precipitant†
  2. Asks about course over time–evolution of episodes
     • “How long do the palpitations last? How have they changed over time?”
     • Duration of episodes:
       • Seconds to <1 minute–typically premature beats (PACs, PVCs)
       • Minutes–SVT, paroxysmal AFib, AVNRT, AVRT
       • Hours to days–persistent AFib, atrial flutter
       • Sustained (>30 seconds with symptoms)–ventricular tachycardia concern†
       • Continuous–persistent arrhythmia, constant awareness (anxiety)
     • Episode termination:
       • Spontaneous resolution
       • Vagal maneuvers effective–coughing, bearing down, cold water on face–suggests SVT
       • Medication required
       • Cardioversion required
       • Does not terminate spontaneously with hemodynamic symptoms†
     • Frequency pattern:
       • First episode ever (new onset)
       • Rare episodes (annually)
       • Occasional (monthly)
       • Frequent (weekly)
       • Daily
       • Increasing frequency†
     • Historical progression:
       • Same pattern for years–reassuring for benign cause
       • Progressive worsening–increasing frequency, duration, symptoms†
  3. Asks about course during day–pattern over 24 hours
     • “Do the palpitations occur at certain times of day or with certain activities?”
     • Activity-related:
       • With exertion–concerning for structural heart disease, ischemia†
       • Post-exertional–more concerning than during†
       • At rest only–often benign ectopy, AFib
       • Both rest and exertion
     • Time of day:
       • Morning–caffeine, stress, thyroid
       • Evening–fatigue, alcohol
       • Nocturnal awakening–more concerning, not anxiety-related if asleep†
       • Random timing
     • Postural:
       • When lying down–vagally triggered
       • When standing–orthostatic, POTS
       • Position change–bending, straining
     • Relation to meals:
       • Post-prandial–vagal stimulation, gastric distension
       • Fasting–hypoglycemia, dehydration
     • Relation to sleep:
       • At bedtime–anxiety, heightened awareness in quiet
       • Waking from sleep–more concerning, suggests arrhythmia†
       • Sleep deprivation triggering episodes
  4. Asks about frequency–pattern of palpitation episodes
     • “How often do you get palpitations?”
     • Episode frequency:
       • First episode ever–new-onset, requires full workup
       • Rare–annually
       • Occasional–monthly
       • Frequent–weekly
       • Daily
       • Increasing frequency†
     • Comparison to prior episodes:
       • Same pattern for years–reassuring
       • More severe than prior–concerning†
       • More frequent than prior–concerning†
       • New associated symptoms–concerning†

• 12.3Triggering & Modifying Heuristic

  1. Asks about triggering factors–what initiates palpitations
     • “What do you think triggers your palpitations?”
     • Stimulants and substances:
       • Caffeine–coffee, tea, energy drinks, chocolate (quantify intake)
       • Alcohol–any amount, binge drinking (“holiday heart”)
       • Tobacco–cigarettes, vaping, nicotine products
       • Recreational drugs–cocaine, amphetamines, MDMA, cannabis†
       • Medications–albuterol, decongestants, thyroid hormone, stimulant ADHD medications
       • Supplements–weight loss products, energy supplements, pre-workout
     • Emotional/psychological:
       • Stress, anxiety, anger
       • Panic attacks–palpitations often prominent
       • Fear, excitement
       • Situational anxiety
     • Physical factors:
       • Exercise/exertion
       • Fever, infection, illness
       • Dehydration
       • Sleep deprivation
       • Hormonal changes–menstruation, menopause
       • Pregnancy
     • Environmental:
       • Heat exposure
       • High altitude
       • Loud noise, startling
  2. Asks about aggravating factors–what makes palpitations worse
     • “What makes the palpitations worse?”
     • Increased heart rate:
       • Continued exertion during episode
       • Standing up during episode
       • Anxiety about the episode–sympathetic activation
       • Additional stimulants
     • Positional:
       • Lying on left side–heart closer to chest wall, increased awareness
       • Bending forward
       • Certain body positions
     • Concurrent factors:
       • Lack of sleep
       • Stress
       • Dehydration
       • Concurrent illness
  3. Asks about maintaining factors–what perpetuates palpitations
     • “What keeps the palpitations going?”
     • Ongoing triggers:
       • Continued stimulant intake
       • Unmanaged stress/anxiety
       • Untreated underlying condition–hyperthyroidism, anemia
       • Poor sleep hygiene
     • Medical factors:
       • Uncontrolled atrial fibrillation–rate or rhythm
       • Untreated hyperthyroidism
       • Undiagnosed structural heart disease
       • Electrolyte imbalances–continued if not corrected
     • Lifestyle factors:
       • Ongoing high caffeine intake
       • Continued alcohol use
       • Poor sleep
       • Deconditioning
  4. Asks about relieving factors–what makes palpitations better
     • “What helps stop or reduce the palpitations?”
     • Vagal maneuvers (suggest SVT if effective):
       • Valsalva maneuver–bearing down
       • Coughing
       • Cold water on face–diving reflex
       • Gagging
       • Document if patient has tried and whether effective
     • Rest and relaxation:
       • Stopping activity
       • Lying down
       • Deep breathing, relaxation techniques
       • Time–spontaneous resolution
     • Medications:
       • Beta-blockers–propranolol, metoprolol
       • “Pill in pocket” antiarrhythmic
       • Anti-anxiety medications
       • AV nodal blockers–for rate control
     • Lifestyle modifications:
       • Reducing caffeine
       • Stopping alcohol
       • Improved sleep
       • Stress management
       • Hydration

• 12.4Accompanying Symptoms & Circumstances Heuristic

  1. Asks about accompanying symptoms–associated symptoms for differential diagnosis
     • “What other symptoms do you have with the palpitations?”
     • Cardiovascular symptoms:
       • Syncope or near-syncope–high-risk arrhythmia (VT, VF, severe bradycardia, torsades)†
       • Presyncope–lightheadedness, tunnel vision, near-fainting†
       • Chest pain–cardiac ischemia, PE†
       • Dyspnea–heart failure, PE†
       • Diaphoresis–profuse sweating, autonomic activation, cardiac ischemia†
       • Edema–bilateral leg swelling suggests heart failure
     • Neurological symptoms:
       • Dizziness–non-vertiginous more common with arrhythmia, postural dizziness
       • Numbness, tingling–often anxiety-related, hyperventilation
       • Tremor–hyperthyroidism, anxiety, stimulants
       • Focal neurological symptoms–stroke from AFib with thromboembolism†
     • Respiratory symptoms:
       • Dyspnea–may indicate heart failure, PE, severe arrhythmia, or hyperventilation with anxiety†
       • Cough–unusual unless heart failure
       • Wheezing–consider cardiac asthma if heart failure
     • Gastrointestinal symptoms:
       • Nausea–vagal response, anxiety, severe arrhythmias
       • Epigastric discomfort–may be referred cardiac sensation
     • Psychological symptoms:
       • Anxiety symptoms–palpitations + anxiety common (can be cause or effect)
       • Panic attack features–intense fear, chest tightness, dyspnea, hyperventilation, sweating, numbness
       • Note–panic attack is diagnosis of exclusion, must rule out cardiac cause first
     • Systemic symptoms:
       • Hyperthyroid features–weight loss, heat intolerance, tremor, anxiety, diarrhea
       • Anemia features–fatigue, pallor, dyspnea, palpitations worse with exertion
       • Fever–infection, sepsis (sinus tachycardia), endocarditis
       • Pheochromocytoma triad–palpitations + severe headache + profuse sweating (episodic)†
  2. Asks about life circumstances–social and occupational context
     • “How does your daily life affect your symptoms?”
     • Occupation:
       • High-stress occupation–type A, executives, healthcare
       • Shift work–disrupted sleep (AFib risk)
       • Physically demanding work
       • Safety-sensitive positions–pilots, drivers, heavy equipment–occupational implications of arrhythmia diagnosis
     • Sleep patterns:
       • Hours per night
       • Sleep quality
       • Snoring, witnessed apneas–sleep apnea → AFib
       • Sleep deprivation as trigger
     • Exercise:
       • Activity level
       • Type of exercise–endurance athletes have increased AFib risk
       • Exercise as trigger vs. protector
     • Stress and mental health:
       • Life stressors–work, relationships, financial
       • Diagnosed anxiety disorder, depression, panic disorder
       • Sleep quality
       • Coping mechanisms
     • Diet:
       • Stimulant intake–caffeine, energy drinks
       • Herbal supplements, weight loss products
       • Electrolyte intake
     • Travel:
       • Recent long flights–DVT/PE risk, jet lag
       • Altitude changes

• 12.5Red Flags & Interconnectedness

  Red Flags–Require immediate or urgent evaluation

  Emergency presentations

  • Palpitations + syncope or near-syncope†
  • Palpitations + chest pain + diaphoresis†
  • Palpitations + severe dyspnea + leg swelling†
  • Rapid palpitations + hypotension†
  • Palpitations + focal neurological deficits†

  High-risk presentations

  • Sustained rapid palpitations (>30 seconds) with symptoms†
  • Palpitations during exertion (not post-exertion)†
  • Known structural heart disease + new palpitations†
  • Does not terminate spontaneously with hemodynamic symptoms†
  • Nocturnal awakening from palpitations†
  • Increasing frequency of episodes†

  Family history red flags

  • Family history of sudden cardiac death <50 years–inherited arrhythmia syndromes (long QT, Brugada, HCM)†

  Specific syndrome red flags

  • Palpitations + severe headache + profuse sweating (episodic)–pheochromocytoma†

  Interconnectedness

  Not to be missed

  • Ventricular tachycardia: palpitations + syncope + known heart disease–immediate cardiac monitoring

  Complaint patterns

  • Atrial fibrillation: completely irregular rhythm + variable intensity + fatigue + dyspnea + stroke risk
  • Atrial flutter: regular rapid palpitations + rate often 150 bpm (2:1 block) + similar stroke risk as AFib
  • SVT (AVNRT, AVRT): sudden onset/offset “like a switch” + regular rapid (150-250 bpm) + may terminate with vagal maneuvers + “frog sign” neck pulsations
  • Premature beats (PACs, PVCs): skipped beats + compensatory pause + “heart pauses then pounds hard” + usually benign
  • Ventricular tachycardia: regular + rapid + sustained + hemodynamic compromise + structural heart disease†
  • WPW syndrome: pre-excitation + delta wave on ECG + prone to SVT + risk of rapid AFib with VF†
  • Sinus tachycardia: regular + gradual onset/offset + appropriate response to triggers (fever, anxiety, dehydration, anemia)
  • Anxiety/panic disorder: palpitations + dyspnea + chest tightness + paresthesias + fear + diagnosis of exclusion
  • Hyperthyroidism: palpitations + weight loss + heat intolerance + tremor + may cause sinus tachycardia or AFib
  • Anemia: palpitations + fatigue + dyspnea + pallor + high-output state + sinus tachycardia
  • Pheochromocytoma: paroxysmal palpitations + severe headache + sweating + episodes of severe hypertension†

  Specific syndrome patterns

  • Young patient + sudden onset/offset palpitations + terminates with vagal maneuvers + regular rapid rate–SVT
  • Patient + completely irregular palpitations + variable intensity + risk factors (age, hypertension, alcohol, sleep apnea)–atrial fibrillation
  • Patient + skipped beats + compensatory pause + brief seconds duration + caffeine/stress trigger–premature beats
  • Known heart disease + palpitations + syncope + sustained episode–ventricular tachycardia†
  • Patient + palpitations + weight loss + heat intolerance + tremor + anxiety–hyperthyroidism
  • Patient + palpitations + fatigue + pallor + dyspnea on exertion–anemia
  • Young athlete + palpitations + syncope + family history sudden death–HCM, arrhythmogenic cardiomyopathy, channelopathy†
  • Patient + episodic palpitations + severe headache + profuse sweating + paroxysmal hypertension–pheochromocytoma†

13--Edema

• 13.1Complaint Heuristic

  1. Asks about the nature of edema and swelling
     • “Tell me about the swelling. What does it look like and feel like?”
     • Nature of swelling:
       • Soft, squishy swelling–pitting edema
       • Firm, hard swelling–non-pitting edema, lymphedema
       • Puffy, boggy appearance
       • Tight, tense skin
       • Shiny, stretched skin
       • Weeping/oozing–fluid leaking from skin (severe edema)
     • Pitting characteristics:
       • Pitting edema–leaves indentation when pressed with finger
       • Depth of pit–shallow vs. deep
       • Time for pit to rebound–seconds to minutes
       • Non-pitting edema–no indentation remains after pressure–lymphedema, lipedema, myxedema (hypothyroidism)
     • Skin changes:
       • Color–normal, red (inflammation/cellulitis), blue/purple (venous), pale
       • Temperature–warm (inflammation, DVT, cellulitis), cool (arterial insufficiency, chronic venous)
       • Texture–smooth, rough, thickened, brawny (chronic lymphedema)
       • Skin breakdown, ulcers
     • Associated findings:
       • Varicose veins–chronic venous insufficiency
       • Skin discoloration, hemosiderin staining–chronic venous
       • Hair loss on affected area–arterial insufficiency
  2. Asks about the intensity of edema
     • “How severe is the swelling? How much has it affected your daily activities?”
     • Functional impact:
       • Mild–no limitation in activities, slight puffiness
       • Moderate–difficulty wearing normal shoes, some discomfort, sock marks visible
       • Severe–unable to wear regular shoes, walking impaired, skin taut and shiny
       • Critical–weeping edema, skin breakdown, immobility†
     • Pitting edema grading:
       • Grade 1+ (Trace)–barely detectable, 2 mm depth, rebounds immediately
       • Grade 2+ (Mild)–4 mm depth, rebounds in <15 seconds
       • Grade 3+ (Moderate)–6 mm depth, rebounds in 15-30 seconds, obvious swelling
       • Grade 4+ (Severe)–8+ mm depth, rebounds >30 seconds, very swollen, tight skin
     • Weight changes:
       • Sudden weight gain–1 liter fluid = 2.2 lbs (1 kg)
       • Rapid gain of 5 lbs (2.3 kg) or more suggests significant fluid retention†
     • Circumference changes:
       • Difference >2 cm between legs is significant for unilateral swelling†
  3. Asks about localization–location of edema
     • “Where exactly is the swelling? Can you show me?”
     • Bilateral lower extremity edema (both legs):
       • Heart failure–right-sided or biventricular†
       • Renal disease–nephrotic syndrome, acute kidney injury, CKD†
       • Liver disease–cirrhosis with ascites†
       • Venous insufficiency–bilateral
       • Medications–calcium channel blockers, NSAIDs
       • Hypoalbuminemia–malnutrition, protein-losing enteropathy
     • Unilateral lower extremity edema (one leg):
       • Deep vein thrombosis (DVT)–asymmetric, warm, tender†
       • Cellulitis–warm, red, tender
       • Ruptured Baker’s cyst
       • Chronic venous insufficiency
       • Lymphedema–primary or secondary
       • Pelvic mass or lymph node compression
     • Upper extremity edema:
       • Unilateral arm–lymphedema (post-mastectomy), axillary vein thrombosis, cellulitis
       • Bilateral arm/face–superior vena cava syndrome†
     • Facial/periorbital edema:
       • Angioedema–allergic reaction, ACE inhibitor-induced†
       • Superior vena cava syndrome–facial plethora, neck vein distension†
       • Nephrotic syndrome–periorbital puffiness, especially morning
       • Hypothyroidism–myxedema, non-pitting facial/periorbital
     • Abdominal swelling (ascites):
       • Liver disease–cirrhosis
       • Heart failure–right-sided
       • Malignancy–peritoneal carcinomatosis
       • Nephrotic syndrome
     • Generalized (anasarca):
       • Severe heart failure, nephrotic syndrome, liver disease, malnutrition
  4. Asks about shifts and radiation–changes in swelling pattern
     • “Has the swelling moved or changed location over time?”
     • Migration patterns (temporal):
       • Started in ankles, progressed up legs to thighs–worsening heart failure, venous insufficiency
       • Started unilateral, became bilateral–initially DVT then systemic cause
       • Started in legs, now abdomen/arms/face–worsening systemic cause (heart, kidney, liver failure)†
     • Asymmetry changes:
       • Initially symmetric, became asymmetric–consider superimposed DVT or cellulitis†
       • Asymmetric progressing to symmetric–worsening systemic disease
     • Positional/dynamic changes:
       • Worse in dependent areas–ankles when standing, sacrum when lying down
       • Improves with elevation–suggests venous or mild cardiac cause
       • Does NOT improve with elevation–lymphedema, severe cardiac/renal failure

• 13.2Time-Intensity Heuristic

  1. Asks about onset–when edema started
     • “When did you first notice the swelling? Did it come on suddenly or gradually?”
     • Sudden onset (hours to days):
       • Deep vein thrombosis (DVT)†
       • Cellulitis†
       • Acute heart failure exacerbation†
       • Acute kidney injury†
       • Allergic reaction/angioedema†
       • Acute liver decompensation†
     • Gradual onset (days to weeks):
       • Chronic venous insufficiency
       • Progressive heart failure
       • Chronic kidney disease
       • Medication-induced–calcium channel blockers
       • Lymphedema development
     • Insidious (months):
       • Advancing chronic heart failure
       • Progressive renal disease
       • Cirrhosis development
     • Precipitating events:
       • After prolonged sitting/standing–venous insufficiency
       • After air travel or long car ride–DVT risk†
       • After starting new medication–drug-induced
       • After surgery or trauma–DVT, lymphedema†
       • After infection–cellulitis, post-infectious glomerulonephritis
  2. Asks about course over time–evolution since onset
     • “Since the swelling started, has it gotten better, worse, or stayed the same?”
     • Duration:
       • Acute (<1 week)–DVT, cellulitis, acute heart failure, allergic reaction
       • Subacute (1-4 weeks)–medication effect, worsening chronic disease
       • Chronic (>1 month)–chronic venous insufficiency, heart failure, CKD, lymphedema
     • Progression:
       • Worsening–increasing swelling, progression of underlying disease†
       • Stable–same degree of swelling, controlled chronic disease
       • Improving–decreasing swelling, responding to treatment
       • Fluctuating–better and worse periods, heart failure exacerbations, dietary sodium variations
     • Weight trend:
       • Rapid weight gain–2-5 lbs (1-2.3 kg) in days (acute fluid retention)†
       • Gradual weight gain–pounds/kilograms over weeks (chronic fluid accumulation)
       • Weight loss with persistent edema–concerning for malignancy, malnutrition with hypoalbuminemia†
  3. Asks about course during day–pattern over 24 hours
     • “Does the swelling change during the day? When is it worst and best?”
     • Diurnal patterns:
       • Worse at end of day, better in morning–venous insufficiency, mild heart failure, dependent edema
       • Worse in morning, improves during day–nephrotic syndrome (periorbital puffiness), hypothyroidism
       • Constant throughout day–severe heart failure, advanced renal disease, lymphedema
       • Fluctuates with activity–worsens after prolonged standing/sitting
     • Relationship to position:
       • Improves with leg elevation–venous, mild cardiac
       • No improvement with elevation–lymphedema, severe cardiac/renal
       • Worse when legs dependent–all dependent edema
       • Presacral edema in bedridden–gravity-dependent redistribution
  4. Asks about frequency–pattern of edema episodes
     • “Is this the first time, or does the swelling come and go?”
     • Episode pattern:
       • First episode ever–new-onset, requires full workup
       • Recurrent episodes–heart failure exacerbations, dietary sodium fluctuations
       • Chronic persistent–chronic venous insufficiency, lymphedema, advanced disease
       • Cyclical–menstrual-related fluid retention
     • Comparison to prior episodes:
       • Same as previous–stable pattern
       • More severe than prior–disease progression†
       • Different location–new pathology, DVT vs. chronic edema
       • New associated symptoms–dyspnea, chest pain, decreased urine output†
     • Trigger patterns:
       • After dietary indiscretion–sodium excess in heart failure
       • After medication non-compliance–missed diuretics
       • After travel or immobility–DVT risk, venous stasis

• 13.3Triggering & Modifying Heuristic

  1. Asks about triggering factors–what initiated the edema
     • “What do you think caused the swelling? Did anything specific happen before it started?”
     • Cardiac causes:
       • Known heart failure–recent medication non-compliance
       • Dietary sodium excess–salty meal, processed foods
       • Fluid overload–excessive fluid intake
       • Recent MI or cardiac event
       • Arrhythmia–atrial fibrillation with reduced cardiac output
     • Renal causes:
       • Kidney disease–known CKD, recent worsening
       • Nephrotic syndrome–heavy proteinuria
       • Acute kidney injury–recent illness, contrast exposure, medications (NSAIDs, ACE inhibitors)†
     • Venous causes:
       • Recent surgery–especially orthopedic, abdominal, pelvic†
       • Prolonged immobilization–long flight (>4 hours), bed rest, hospitalization†
       • Active malignancy–solid tumors, chemotherapy†
       • Pregnancy or postpartum period†
       • Oral contraceptives, hormone replacement therapy†
       • Previous DVT or PE†
       • Trauma to leg†
     • Medications:
       • Calcium channel blockers–amlodipine, nifedipine (common cause)
       • NSAIDs–ibuprofen, naproxen (fluid retention)
       • Corticosteroids–prednisone (fluid and sodium retention)
       • Thiazolidinediones–pioglitazone, rosiglitazone
       • Estrogen/progesterone–oral contraceptives, HRT
       • Recent medication initiation or dose increase
     • Inflammatory/Infectious:
       • Cellulitis–red, warm, tender, spreading erythema†
       • DVT with secondary inflammation†
       • Insect bite or sting
       • Allergic reaction†
     • Hormonal:
       • Menstrual cycle–premenstrual fluid retention
       • Pregnancy–physiologic edema (especially third trimester)
       • Hypothyroidism–myxedema
  2. Asks about aggravating factors–what makes edema worse
     • “What makes the swelling worse?”
     • Positional:
       • Prolonged standing or sitting–venous pooling
       • Legs dependent–gravity effect
       • Heat exposure–vasodilation, increased venous pooling
     • Dietary:
       • High sodium/salt intake–fluid retention
       • Excessive fluid intake–in heart failure patients
       • Alcohol consumption–liver disease
     • Activity:
       • Prolonged immobility–venous stasis
       • Lack of leg elevation
       • Tight clothing around legs–socks, garters
     • Medications:
       • Non-compliance with diuretics
       • NSAIDs, calcium channel blockers
  3. Asks about maintaining factors–what perpetuates edema
     • “What keeps the swelling from improving?”
     • Poor disease control:
       • Non-adherence to medications–diuretics, heart failure medications
       • Uncontrolled heart failure
       • Progressive kidney disease
       • Advanced liver disease
     • Lifestyle:
       • High sodium diet
       • Inadequate fluid restriction–in heart failure
       • Sedentary lifestyle
       • Obesity
     • Venous/Lymphatic:
       • No compression stockings use–venous insufficiency, lymphedema
       • Not elevating legs
       • Continued immobility
     • Ongoing triggers:
       • Continued medication causing edema
       • Untreated underlying condition
  4. Asks about relieving factors–what makes edema better
     • “What have you tried that helps reduce the swelling?”
     • Positional:
       • Leg elevation above heart level–reduces venous pooling
       • Sleeping with legs elevated–overnight fluid redistribution
       • Lying down–redistributes fluid (presacral edema may develop)
     • Medications:
       • Loop diuretics–furosemide, bumetanide, torsemide
       • Thiazide diuretics–hydrochlorothiazide, chlorthalidone
       • Potassium-sparing–spironolactone (also for cirrhosis)
       • Discontinuing causative medication–calcium channel blocker, NSAID
     • Compression therapy:
       • Compression stockings–20-30 mmHg (venous insufficiency)
       • Compression wraps, pneumatic compression devices–lymphedema
     • Dietary:
       • Sodium restriction–<2 grams/day (heart failure)
       • Fluid restriction–1.5-2 liters/day (heart failure, renal)
       • Weight loss–if obesity contributing
     • Activity:
       • Walking–calf muscle pump improves venous return
       • Leg exercises–ankle pumps, flexion/extension
       • Swimming–water pressure assists venous return
     • Treatment of underlying cause:
       • Anticoagulation for DVT–improvement over days to weeks
       • Antibiotics for cellulitis–improvement in 24-48 hours
       • Treatment of heart failure–diuresis, improvement in days

• 13.4Accompanying Symptoms & Circumstances Heuristic

  1. Asks about accompanying symptoms–associated symptoms for differential diagnosis
     • “Besides swelling, what other symptoms are you experiencing?”
     • Cardiovascular symptoms:
       • Dyspnea–bilateral leg edema + dyspnea (heart failure, pulmonary hypertension)†
       • Orthopnea–difficulty breathing lying flat (heart failure)†
       • Paroxysmal nocturnal dyspnea (PND)–waking from sleep with dyspnea (heart failure)†
       • Chest pain–heart failure from MI, PE with leg DVT†
       • Palpitations–irregular heartbeat with swelling (atrial fibrillation with heart failure)
       • Weight gain–fluid retention, quantify pounds/kilograms†
       • Abdominal distension–ascites
     • DVT-specific symptoms (if unilateral leg swelling):
       • Pain–calf pain, tenderness†
       • Warmth–affected leg warm to touch†
       • Erythema–redness†
       • Tenderness–especially along deep venous pathway†
       • Difference in leg circumference >2 cm†
     • Chronic venous insufficiency symptoms:
       • Aching, heaviness–worse end of day
       • Varicose veins
       • Skin changes–hemosiderin staining, venous stasis ulcers
     • Renal/Urinary symptoms:
       • Decreased urine output (oliguria)–kidney failure†
       • Dark, tea-colored urine–glomerulonephritis
       • Foamy urine–proteinuria (nephrotic syndrome)
       • Periorbital edema–especially morning (nephrotic syndrome)†
     • Hepatic/Gastrointestinal symptoms:
       • Ascites–abdominal distension (cirrhosis, right heart failure)†
       • Jaundice–yellow skin, scleral icterus (liver failure)†
       • Abdominal pain–right upper quadrant (hepatomegaly)†
       • Easy bruising, spider angiomas, palmar erythema–chronic liver signs
     • Inflammatory/Infectious symptoms (cellulitis):
       • Fever†
       • Erythema–red, spreading, well-demarcated border†
       • Warmth–hot to touch†
       • Tenderness–painful to palpation†
       • Lymphangitic streaking, regional lymphadenopathy
     • Allergic symptoms:
       • Angioedema–facial/tongue swelling, difficulty breathing/swallowing†
       • Urticaria (hives), pruritus
     • Systemic symptoms:
       • Fatigue–heart failure, kidney disease, liver disease, anemia
       • Weight loss–malignancy, cardiac cachexia†
       • Night sweats–malignancy, endocarditis
     • Endocrine symptoms:
       • Hypothyroidism–fatigue, cold intolerance, weight gain, constipation, dry skin, hair loss
       • Myxedema–non-pitting edema, especially facial/periorbital
  2. Asks about life circumstances–social and occupational context
     • “How does your daily life affect your symptoms?”
     • Occupation:
       • Prolonged standing–hairdresser, teacher, retail, healthcare (venous insufficiency)
       • Prolonged sitting–desk job, truck driver, pilot (venous stasis, DVT risk)
       • Physical demands
     • Travel:
       • Recent long flights or car trips–DVT risk (>4 hours)†
       • Travel to endemic areas–filariasis (lymphedema)
     • Activity level:
       • Exercise frequency–important for venous return
       • Mobility limitations–arthritis, neurological conditions
       • Bedridden or chair-bound–dependent edema pattern
     • Diet:
       • Sodium intake–processed foods, restaurant meals, adding salt
       • Fluid intake–excessive in heart failure patients
       • Protein intake–malnutrition → hypoalbuminemia → edema
       • Alcohol–liver disease risk
     • Living situation:
       • Stairs–difficulty climbing (heart failure symptom)
       • Compression stocking compliance–ability to don/doff
       • Support system
       • Medication access and affordability

• 13.5Red Flags & Interconnectedness

  Red Flags–Require immediate or urgent evaluation

  Emergency presentations

  • Bilateral leg edema + dyspnea + orthopnea–acute decompensated heart failure†
  • Unilateral leg swelling + pain + warmth–deep vein thrombosis†
  • Unilateral leg edema + chest pain + dyspnea–DVT with pulmonary embolism†
  • Edema + facial swelling + tongue swelling–angioedema, potential airway emergency†
  • Sudden severe leg swelling + severe pain–phlegmasia cerulea dolens (massive DVT)†

  High-risk presentations

  • Bilateral leg edema + decreased urine output–acute kidney injury, nephrotic syndrome†
  • Edema + ascites + jaundice–liver failure†
  • Edema + fever + red, warm leg–cellulitis†
  • Edema + facial plethora + neck vein distension–superior vena cava syndrome†
  • Rapid weight gain 5 lbs (2.3 kg) or more in days†

  DVT risk factor red flags

  • Recent surgery (orthopedic, abdominal, pelvic) + unilateral leg swelling†
  • Prolonged immobilization + unilateral leg swelling†
  • Active malignancy + new leg swelling†
  • Pregnancy/postpartum + leg swelling†
  • Previous DVT/PE + new leg swelling†

  Interconnectedness

  Not to be missed

  • Deep vein thrombosis: unilateral leg swelling + pain + warmth + tenderness–may progress to PE

  Complaint patterns

  • Acute decompensated heart failure: bilateral lower extremity pitting edema + dyspnea + orthopnea + PND + rapid weight gain + JVD + pulmonary rales
  • Deep vein thrombosis (DVT): unilateral leg swelling + calf pain/tenderness + warmth + mild erythema + risk factors (surgery, immobilization, malignancy)
  • Nephrotic syndrome: bilateral edema + periorbital puffiness (especially morning) + foamy urine + hypoalbuminemia + generalized edema in severe cases
  • Cirrhosis with ascites: bilateral leg edema + abdominal distension + jaundice + spider angiomas + history of alcohol/hepatitis
  • Chronic venous insufficiency: bilateral or unilateral leg edema + worse end of day + better with elevation + varicose veins + hemosiderin staining + venous ulcers
  • Cellulitis: unilateral erythema + warmth + tenderness + spreading well-demarcated border + fever + chills
  • Lymphedema: unilateral or bilateral non-pitting edema + skin thickening + “peau d’orange” + Stemmer’s sign + minimal improvement with elevation
  • Medication-induced edema: bilateral ankle edema + recent start of amlodipine/nifedipine + no dyspnea + normal cardiac/renal function
  • Hypothyroidism (myxedema): non-pitting edema (facial/periorbital) + fatigue + cold intolerance + constipation + dry skin + hair loss
  • Angioedema (ACE inhibitor): facial swelling (lips, tongue) + difficulty breathing/swallowing + history of ACE inhibitor use
  • Superior vena cava syndrome: facial swelling + neck swelling + bilateral upper extremity edema + facial plethora + dilated chest wall veins

  Specific syndrome patterns

  • Patient + bilateral leg edema + dyspnea + orthopnea + rapid weight gain + JVD–heart failure
  • Patient + unilateral warm tender leg + recent surgery or immobilization + calf pain–DVT†
  • Patient + periorbital puffiness (morning) + foamy urine + generalized edema–nephrotic syndrome
  • Patient + bilateral edema + ascites + jaundice + history of alcohol–cirrhosis
  • Patient + leg edema worse end of day + varicose veins + hemosiderin staining–chronic venous insufficiency
  • Patient + unilateral red warm tender leg + fever + spreading erythema–cellulitis†
  • Patient + bilateral ankle edema + started amlodipine + no dyspnea–medication-induced edema
  • Patient on ACE inhibitor + facial/tongue swelling + difficulty breathing–angioedema†

14RESPIRATORY SYSTEM

15--Dyspnea & Shortness of Breath

• 15.1Complaint Heuristic

  1. Asks about the nature of dyspnea
     • “Tell me about your breathing difficulty. What does it feel like?”
     • Nature of breathing difficulty:
       • Shortness of breath–unable to get enough air, breathlessness
       • Air hunger–feeling of needing to take deep breaths
       • Labored breathing–increased effort to breathe
       • Chest tightness–constriction, pressure, inability to expand chest fully
       • Suffocation sensation–feeling of choking, can’t catch breath
     • Quality:
       • Cannot complete sentences without pausing for breath
       • Rapid shallow breathing (tachypnea)
       • Deep sighing breaths
       • Gasping for air
       • Inability to take deep breath
     • Breathing pattern:
       • Continuous breathlessness
       • Intermittent–comes and goes in episodes
       • Paroxysmal–sudden severe episodes
       • Orthopnea–worse when lying flat (heart failure, COPD)
       • Platypnea–worse when upright, better lying down (hepatopulmonary syndrome, intracardiac shunt)
  2. Asks about the intensity of dyspnea
     • “How severe is your shortness of breath? How is it affecting you?”
     • Functional impact:
       • Mild–can perform usual activities with slight limitation
       • Moderate–significant activity limitation, needs to slow down or rest
       • Severe–unable to perform basic daily activities, homebound
       • Critical–breathless at rest, unable to speak in full sentences†
     • Rest vs. exertional:
       • Dyspnea only with exertion–cardiac, pulmonary disease
       • Dyspnea at rest–severe disease, PE, pneumothorax, heart failure, severe asthma/COPD exacerbation†
     • Number of pillows needed:
       • One pillow–normal
       • Two or more pillows–orthopnea (heart failure, COPD)
       • Sleeping in recliner or sitting upright–severe orthopnea†
     • mMRC Dyspnea Scale:
       • Grade 0–only breathless with strenuous exercise
       • Grade 1–short of breath when hurrying on level ground or walking up slight hill
       • Grade 2–walks slower than same age due to breathlessness, stops for breath at own pace
       • Grade 3–stops for breath after walking about 100 meters or after few minutes on level ground
       • Grade 4–too breathless to leave house, or breathless when dressing/undressing†
  3. Asks about localization–where breathing difficulty is felt
     • “Where do you feel the breathing difficulty?”
     • Sensation location:
       • Chest–tightness, constriction across chest
       • Throat–upper airway sensation, throat closing
       • Generalized–whole body oxygen need
     • Associated chest areas:
       • Anterior chest–heart, anterior lung fields
       • Posterior chest/back–posterior lung fields
       • Unilateral–one side only (pneumothorax, pleural effusion, pneumonia)
       • Bilateral–both sides (COPD, heart failure, bilateral pneumonia)
  4. Asks about shifts and radiation–changes in dyspnea pattern
     • “Has your breathing difficulty changed over time or with position?”
     • Migration patterns (temporal):
       • Started with exertion, now at rest–worsening disease†
       • Started unilateral, now bilateral–progression
       • Improved with position change or treatment
     • Positional/dynamic changes:
       • Worse lying flat → better sitting up–orthopnea (heart failure, COPD, diaphragm paralysis)
       • Worse sitting up → better lying flat–platypnea (rare, hepatopulmonary syndrome)
       • Better leaning forward–pericarditis, severe COPD
       • Worse on one side–unilateral pleural effusion, pneumothorax

• 15.2Time-Intensity Heuristic

  1. Asks about onset–when dyspnea started
     • “When did the shortness of breath start, and how did it come on?”
     • Timing:
       • Sudden onset (within minutes)–pulmonary embolism, pneumothorax, acute MI, anaphylaxis, foreign body aspiration†
       • Rapid onset (hours)–pneumonia, acute heart failure, asthma exacerbation, COPD exacerbation†
       • Gradual onset (days to weeks)–pleural effusion, anemia, subacute infection
       • Insidious (months to years)–COPD, interstitial lung disease, heart failure, pulmonary hypertension
     • Precipitating events:
       • Sudden onset during physical activity–MI, PE†
       • Following viral illness–pneumonia, myocarditis
       • After trauma–pneumothorax, rib fracture, pulmonary contusion†
       • After surgery–PE, atelectasis†
       • No clear precipitant
  2. Asks about course over time–evolution since onset
     • “Since the shortness of breath started, has it gotten better, worse, or stayed the same?”
     • Duration:
       • Acute (<1 week)–infection, PE, pneumothorax, acute heart failure
       • Subacute (1-4 weeks)–resolving pneumonia, worsening heart failure
       • Chronic (>1 month)–COPD, interstitial lung disease, chronic heart failure, pulmonary hypertension
     • Progression:
       • Improving–breathlessness decreasing, resolving infection, effective treatment
       • Stable–same level consistently, controlled chronic disease
       • Worsening–progressive decline in exercise tolerance, advancing disease, treatment failure†
       • Fluctuating–variable with exacerbations and remissions (asthma, COPD, heart failure)
     • Trend over months to years:
       • Gradual worsening over years–COPD, interstitial lung disease
       • Stepwise decline with acute exacerbations–COPD, asthma
       • Recent rapid decline–malignancy, accelerated pulmonary hypertension†
  3. Asks about course during day–pattern over 24 hours
     • “Does your breathing change at certain times of day?”
     • Diurnal patterns:
       • Worse in morning–nocturnal asthma, heart failure with overnight fluid redistribution
       • Worse in evening–fatigue, deconditioning
       • Constant throughout day–stable chronic disease
       • Worse at night–paroxysmal nocturnal dyspnea in heart failure, nocturnal asthma
       • Variable throughout day–anxiety, deconditioning
     • Nocturnal patterns:
       • Paroxysmal nocturnal dyspnea (PND)–waking suddenly gasping for air 1-2 hours after falling asleep (heart failure)†
       • Sleep-disordered breathing–snoring, apneas, gasping during sleep
       • Early morning wheezing–2-6 AM worsening (nocturnal asthma)
  4. Asks about frequency–pattern of dyspnea episodes
     • “How often do you experience shortness of breath?”
     • Episode frequency:
       • First episode ever–new-onset, requires full workup
       • Occasional episodes–intermittent asthma, situational
       • Daily symptoms–chronic disease (COPD, heart failure, interstitial lung disease)
       • Continuous–severe chronic disease
     • Comparison to prior episodes:
       • Same as previous–stable pattern
       • More severe than prior–disease progression†
       • More frequent than prior–worsening control†
       • New pattern of symptoms–different etiology
     • Exacerbation pattern:
       • Seasonal exacerbations–allergic asthma, COPD in winter
       • Triggered by infections–COPD, asthma exacerbations
       • Unpredictable exacerbations

• 15.3Triggering & Modifying Heuristic

  1. Asks about triggering factors–what initiates dyspnea
     • “What brings on your shortness of breath?”
     • Physical activity:
       • Exertional dyspnea–walking, climbing stairs, carrying objects (cardiac or pulmonary disease)
       • Distance or number of flights before onset
       • Comparison to prior exercise tolerance
       • Dyspnea after lying down after exertion–heart failure
     • Environmental triggers:
       • Allergens–seasonal patterns (pollen), indoor (dust mites, pet dander, mold)
       • Irritants–cold air, air pollution, strong odors, smoke
       • Weather–temperature extremes, humidity changes
     • Occupational exposures:
       • Dust–silica, coal, asbestos, grain (pneumoconiosis)
       • Chemicals–isocyanates, solvents (occupational asthma)
       • Organic dusts–hay, bird droppings (hypersensitivity pneumonitis)
       • Work-related pattern–better on weekends/vacations suggests occupational asthma
     • Infectious exposures:
       • Recent upper respiratory infection–post-viral bronchospasm, pneumonia
       • Sick contacts–viral/bacterial infection
       • Travel–long flights (PE risk)†
     • Thromboembolic risk factors:
       • Recent surgery or hospitalization†
       • Prolonged immobilization, long travel†
       • Active malignancy†
       • Pregnancy or postpartum period†
       • Oral contraceptives, hormone therapy†
       • Previous DVT or PE†
     • Emotional/psychological:
       • Anxiety, panic attacks–hyperventilation, psychogenic dyspnea
       • Stress triggers–asthma exacerbation
  2. Asks about aggravating factors–what makes dyspnea worse
     • “What makes your breathing worse?”
     • Activity:
       • Walking uphill or climbing stairs
       • Carrying heavy objects
       • Bending over–increased abdominal pressure in COPD
       • Talking or laughing–increased oxygen demand
     • Position:
       • Lying flat–orthopnea in heart failure, COPD
       • Sleeping–paroxysmal nocturnal dyspnea in heart failure
     • Environmental:
       • Cold air inhalation–bronchospasm
       • High altitude–reduced oxygen
       • Humid or polluted air
     • Eating:
       • Large meals–diaphragmatic compression
       • Bloating or gas–abdominal distension
     • Emotional:
       • Anxiety or stress–increased respiratory rate
       • Panic–hyperventilation
  3. Asks about maintaining factors–what perpetuates dyspnea
     • “What keeps your breathing from improving?”
     • Poor disease control:
       • Non-adherence to medications–inhaler technique, skipped doses
       • Suboptimal treatment regimen
       • Continued exposure to triggers–ongoing smoking, occupational exposures
     • Comorbidities:
       • Obesity–increased work of breathing, sleep apnea
       • Heart failure–fluid overload
       • Anemia–reduced oxygen-carrying capacity
       • Deconditioning–reduced exercise tolerance
       • Anxiety–perpetuates dyspnea cycle
     • Social & environmental:
       • Continued smoking
       • Inability to avoid allergens or irritants
       • Poor housing–mold, dampness
       • Limited access to healthcare
     • Lifestyle:
       • Sedentary lifestyle–worsening deconditioning
       • Poor nutrition
       • Inadequate fluid intake–thick secretions in COPD
  4. Asks about relieving factors–what makes dyspnea better
     • “What helps your breathing?”
     • Position changes:
       • Sitting upright or standing–orthopnea relief in heart failure, COPD
       • Leaning forward, tripod position–COPD, pericarditis
     • Medications:
       • Inhaled bronchodilators–immediate relief in minutes (asthma, COPD)
       • Inhaled corticosteroids–gradual improvement over days (asthma)
       • Diuretics–relief over hours to days (heart failure)
       • Supplemental oxygen–immediate relief
       • Antibiotics–improvement over days (pneumonia)
     • Breathing techniques:
       • Pursed-lip breathing–COPD
       • Slow deep breathing–anxiety, hyperventilation
       • Use of incentive spirometer
     • Lifestyle & environmental:
       • Rest–exertional dyspnea
       • Avoiding triggers–allergens, irritants, cold air
       • Weight loss–obesity-related dyspnea
       • Smoking cessation
     • Physical interventions:
       • Chest physiotherapy, pulmonary rehabilitation
       • Thoracentesis–immediate relief (large pleural effusion)
       • Chest tube–relief within hours (pneumothorax)

• 15.4Accompanying Symptoms & Circumstances Heuristic

  1. Asks about accompanying symptoms–associated symptoms for differential diagnosis
     • “What other symptoms do you have with the shortness of breath?”
     • Respiratory symptoms:
       • Cough–productive or dry
       • Sputum–clear/white (chronic bronchitis, viral), yellow/green (bacterial infection), pink frothy (pulmonary edema)†, bloody (hemoptysis)†
       • Wheezing–audible wheeze (asthma, COPD)
       • Stridor–high-pitched inspiratory sound (upper airway obstruction, anaphylaxis)†
       • Pleuritic chest pain–sharp, worse with breathing/coughing (PE, pneumonia, pleuritis, pneumothorax)†
     • Cardiovascular symptoms:
       • Crushing substernal chest pain–cardiac ischemia (MI, angina)†
       • Pressure, tightness, radiation to arm/jaw/back†
       • Palpitations–heart racing, skipping beats (arrhythmia, heart failure)
       • Bilateral lower extremity edema–heart failure, cor pulmonale
       • Orthopnea–number of pillows needed
       • Paroxysmal nocturnal dyspnea (PND)†
       • Weight gain from fluid retention
       • Syncope or presyncope–arrhythmia, severe pulmonary hypertension, PE†
     • DVT symptoms (if leg swelling):
       • Unilateral leg pain–DVT → PE risk†
       • Leg swelling, warmth, redness†
     • Systemic symptoms:
       • Fever–pneumonia, PE, tuberculosis, endocarditis†
       • Fatigue–heart failure, anemia, chronic disease
       • Weight loss–malignancy, COPD, tuberculosis, heart failure†
       • Night sweats–tuberculosis, lymphoma, endocarditis†
       • Lightheadedness, dizziness–hypoxia, anemia, arrhythmia
       • Cyanosis–blue lips, fingernails (severe hypoxia)†
     • Upper airway symptoms:
       • Nasal congestion, rhinorrhea–upper respiratory infection
       • Throat irritation or pain
       • Hoarseness, voice changes
     • Allergic/anaphylaxis symptoms:
       • Urticaria (hives), pruritus
       • Facial/tongue swelling†
       • Hypotension†
  2. Asks about life circumstances–social and occupational context
     • “How does your daily life affect your breathing?”
     • Tobacco use:
       • Current smoking status
       • Pack-years calculation–(packs per day) × (years smoked)
       • Quit date if former smoker
       • Secondhand smoke exposure
       • E-cigarettes, vaping–EVALI risk
     • Occupational history:
       • Current and past occupations
       • Exposures–dusts, chemicals, fumes, asbestos, silica
       • Protective equipment use
       • Work-related pattern–better on weekends/vacations suggests occupational asthma
     • Home environment:
       • Pets–allergen exposure
       • Mold, dampness
       • Heating system–gas vs. electric
       • Carpet, upholstery–dust mites
     • Functional status:
       • Activities of daily living (ADLs)–bathing, dressing, toileting
       • Exercise tolerance
       • Employment status, disability
     • Psychosocial:
       • Anxiety, depression–can worsen dyspnea perception
       • Support system
       • Financial barriers to medication adherence

• 15.5Red Flags & Interconnectedness

  1. Asks about accompanying symptoms–associated symptoms for differential diagnosis
     • “What other symptoms do you have with the shortness of breath?”
     • Respiratory symptoms:
       • Cough–productive or dry
       • Sputum–clear/white (chronic bronchitis, viral), yellow/green (bacterial infection), pink frothy (pulmonary edema)†, bloody (hemoptysis)†
       • Wheezing–audible wheeze (asthma, COPD)
       • Stridor–high-pitched inspiratory sound (upper airway obstruction, anaphylaxis)†
       • Pleuritic chest pain–sharp, worse with breathing/coughing (PE, pneumonia, pleuritis, pneumothorax)†
     • Cardiovascular symptoms:
       • Crushing substernal chest pain–cardiac ischemia (MI, angina)†
       • Pressure, tightness, radiation to arm/jaw/back†
       • Palpitations–heart racing, skipping beats (arrhythmia, heart failure)
       • Bilateral lower extremity edema–heart failure, cor pulmonale
       • Orthopnea–number of pillows needed
       • Paroxysmal nocturnal dyspnea (PND)†
       • Weight gain from fluid retention
       • Syncope or presyncope–arrhythmia, severe pulmonary hypertension, PE†
     • DVT symptoms (if leg swelling):
       • Unilateral leg pain–DVT → PE risk†
       • Leg swelling, warmth, redness†
     • Systemic symptoms:
       • Fever–pneumonia, PE, tuberculosis, endocarditis†
       • Fatigue–heart failure, anemia, chronic disease
       • Weight loss–malignancy, COPD, tuberculosis, heart failure†
       • Night sweats–tuberculosis, lymphoma, endocarditis†
       • Lightheadedness, dizziness–hypoxia, anemia, arrhythmia
       • Cyanosis–blue lips, fingernails (severe hypoxia)†
     • Upper airway symptoms:
       • Nasal congestion, rhinorrhea–upper respiratory infection
       • Throat irritation or pain
       • Hoarseness, voice changes
     • Allergic/anaphylaxis symptoms:
       • Urticaria (hives), pruritus
       • Facial/tongue swelling†
       • Hypotension†
  2. Asks about life circumstances–social and occupational context
     • “How does your daily life affect your breathing?”
     • Tobacco use:
       • Current smoking status
       • Pack-years calculation–(packs per day) × (years smoked)
       • Quit date if former smoker
       • Secondhand smoke exposure
       • E-cigarettes, vaping–EVALI risk
     • Occupational history:
       • Current and past occupations
       • Exposures–dusts, chemicals, fumes, asbestos, silica
       • Protective equipment use
       • Work-related pattern–better on weekends/vacations suggests occupational asthma
     • Home environment:
       • Pets–allergen exposure
       • Mold, dampness
       • Heating system–gas vs. electric
       • Carpet, upholstery–dust mites
     • Functional status:
       • Activities of daily living (ADLs)–bathing, dressing, toileting
       • Exercise tolerance
       • Employment status, disability
     • Psychosocial:
       • Anxiety, depression–can worsen dyspnea perception
       • Support system
       • Financial barriers to medication adherence

16--Cough

• 16.1Complaint Heuristic

  1. Asks about the nature of cough
     • “Tell me about your cough. Is it dry or do you bring up phlegm?”
     • Productive vs. non-productive:
       • Dry cough–non-productive, no sputum (viral, post-viral, ACE inhibitor, asthma, GERD)
       • Wet cough–productive, sputum produced (bacterial infection, bronchitis, pneumonia, bronchiectasis)
       • Mixed–sometimes productive, sometimes dry
     • Cough quality/sound:
       • Barking–seal-like bark (croup, tracheal irritation)
       • Whooping–inspiratory whoop after coughing paroxysm (pertussis)†
       • Hacking–short, frequent, dry coughs (viral, irritation, post-nasal drip)
       • Honking–goose-like honk (psychogenic, habit cough)
       • Brassy–metallic quality (tracheal pathology, vocal cord dysfunction)
       • Rattling–chest rattles, loose (excessive secretions, bronchiectasis)
     • Sputum color (if productive):
       • Clear/white–viral, allergic, GERD, chronic bronchitis (non-infected)
       • Yellow–purulent, bacterial infection
       • Green–bacterial infection, chronic bronchitis, bronchiectasis
       • Rust-colored/brown–pneumococcal pneumonia, old blood
       • Pink/frothy–pulmonary edema (heart failure)†
       • Blood-tinged/streaked–bronchitis, pneumonia, TB, malignancy, PE†
       • Frank blood–hemoptysis†
     • Sputum volume and consistency:
       • Minimal–teaspoon amounts
       • Moderate–tablespoon amounts per cough
       • Copious–>30 mL/day (bronchiectasis, lung abscess)
       • Foul-smelling–anaerobic infection, lung abscess, aspiration pneumonia†
  2. Asks about the intensity of cough
     • “How severe is your cough? How is it affecting your daily life?”
     • Functional impact:
       • Work/school–able to work vs. missing work/school
       • Sleep–sleep disruption, number of times waking per night
       • Social–embarrassment, avoidance of public places
       • Physical–urinary incontinence with coughing, chest/rib pain from excessive coughing
       • Exhaustion–fatigue from persistent coughing
       • Vomiting–post-tussive emesis (pertussis, severe cough)
     • Severity of episodes:
       • Mild–brief coughs, minimal discomfort
       • Moderate–prolonged coughing episodes, tiring
       • Severe–exhausting, can’t catch breath, induces vomiting, syncope†
     • Frequency:
       • Occasional–few times per day
       • Frequent–multiple times per hour
       • Constant–nearly continuous coughing
       • Paroxysmal–severe coughing fits, uncontrollable (pertussis, aspiration, PE)†
  3. Asks about localization–perceived origin of cough
     • “Where do you feel the cough coming from?”
     • Cough source sensation:
       • Throat–upper airway, post-nasal drip, pharyngitis, laryngitis
       • Upper chest–tracheal irritation, bronchitis
       • Deep chest–lower airways, pneumonia, bronchitis, asthma
       • Diffuse/can’t localize–systemic causes, widespread airway involvement
     • Associated chest sensations:
       • Tickle in throat–post-nasal drip, pharyngitis, irritation
       • Chest tightness–asthma, bronchospasm, cardiac
       • Burning in chest–GERD, esophagitis, tracheitis
       • Pressure/heaviness–pneumonia, cardiac, pleural disease
  4. Asks about shifts and radiation–associated pain patterns
     • “Do you have any pain with your cough? Does it spread anywhere?”
     • Associated pain radiation:
       • Pleuritic chest pain–sharp, worsens with cough/deep breath (pleuritis, pneumonia, PE)†
       • Pain radiating to back–posterior pneumonia, esophagitis
       • Headache with cough–sinus pressure, cough-induced (increased intracranial pressure)
     • Note:
       • Cough itself does not migrate spatially–associated pain may have radiation patterns

• 16.2Time-Intensity Heuristic

  1. Asks about onset–when cough started
     • “When did the cough start, and how did it come on?”
     • Timing:
       • Sudden–acute onset (aspiration, foreign body, pneumonia, PE)†
       • Gradual–slow onset over days (viral URI, bronchitis)
       • Insidious–can’t pinpoint exact start (chronic causes)
     • Duration classification (CRITICAL):
       • Acute cough (<3 weeks)–viral URI, acute bronchitis, pneumonia, aspiration
       • Subacute cough (3-8 weeks)–post-infectious, post-viral cough, bacterial sinusitis, pertussis
       • Chronic cough (>8 weeks)–GERD, asthma, post-nasal drip, ACE inhibitor, chronic bronchitis, COPD, malignancy, TB†
     • Circumstances at onset:
       • After upper respiratory infection–post-viral cough, bacterial superinfection
       • After choking episode–foreign body aspiration†
       • After starting new medication–ACE inhibitor cough
       • After sick contact–infectious etiology (viral, pertussis)
  2. Asks about course over time–evolution since onset
     • “Since the cough started, has it gotten better, worse, or stayed the same?”
     • Progression pattern:
       • Improving–resolving viral URI, responding to treatment
       • Stable–same intensity (chronic stable condition)
       • Worsening–progressive increase in frequency/severity (malignancy, TB, worsening COPD, heart failure)†
       • Fluctuating–variable (asthma, allergic, environmental triggers)
       • Episodic–distinct episodes with cough-free intervals (asthma, allergic)
     • Changes in cough character:
       • Started dry, now productive–bacterial superinfection, pneumonia developing
       • Started productive, now dry–infection resolving
       • Development of hemoptysis–serious pathology†
  3. Asks about course during day–pattern over 24 hours
     • “Is the cough worse at certain times of day?”
     • Diurnal patterns (diagnostically important):
       • Morning predominant–chronic bronchitis, COPD, bronchiectasis (clearing overnight secretions), post-nasal drip, heart failure
       • Nighttime/lying down–GERD (acid reflux when supine), asthma (nocturnal), post-nasal drip, heart failure (orthopnea)†
       • Constant throughout day–severe infection, malignancy, chronic lung disease
       • With activity/talking–exercise-induced (asthma), cardiac (heart failure, ischemia)
     • Sleep disruption:
       • Waking from sleep–number of times per night
       • Unable to lie flat–orthopnea (heart failure, severe GERD)†
  4. Asks about frequency–pattern and triggers
     • “How often do you cough? Does it come and go?”
     • Consistency:
       • Continuous–throughout day and night (severe infection, obstruction, advanced malignancy)
       • Intermittent–comes and goes (asthma, allergic, environmental triggers)
       • Episodic–distinct coughing fits (pertussis, aspiration)
       • Seasonal–worse certain times of year (allergic rhinitis, seasonal asthma)
     • Triggering events:
       • With eating/drinking–aspiration risk, GERD, swallowing dysfunction†
       • With talking/laughing–laryngeal irritation, asthma, habit cough
       • With cold air–asthma, reactive airway
       • With exercise–exercise-induced bronchospasm (asthma), cardiac

• 16.3Triggering & Modifying Factors Heuristic

  1. Asks about triggering factors–what initiated the cough
     • “What do you think brought on your cough?”
     • Infections:
       • Upper respiratory infection–common cold, viral (rhinovirus, influenza)
       • Acute bronchitis–usually viral, sometimes bacterial
       • Pneumonia–bacterial, viral, atypical†
       • Pertussis (whooping cough)–paroxysmal cough with inspiratory whoop†
       • Tuberculosis–chronic cough, night sweats, weight loss, hemoptysis†
       • COVID-19–dry cough, fever, dyspnea, loss of taste/smell
     • Medications:
       • ACE inhibitors–lisinopril, enalapril, ramipril (5-35% incidence, dry persistent cough)
       • Onset days to months after starting–resolution 1-4 weeks after stopping
       • Beta-blockers–bronchospasm in asthmatics
     • Aspiration:
       • Foreign body–sudden onset cough after choking, unilateral wheeze, persistent cough†
       • Food/liquid–swallowing dysfunction, stroke, dementia, GERD
       • Gastric contents–GERD with aspiration†
     • Environmental exposures:
       • Irritants–smoke (tobacco, wildfire), fumes, chemicals, strong odors
       • Allergens–pollen, dust mites, mold, pet dander (allergic rhinitis, asthma)
       • Occupational–asbestos, silica, coal dust, grain dust, chemicals
     • Respiratory conditions:
       • Asthma–new diagnosis or exacerbation
       • COPD–chronic bronchitis, emphysema (smoking history)
       • Bronchiectasis–chronic productive cough, recurrent infections
     • Upper airway:
       • Post-nasal drip–allergic rhinitis, chronic sinusitis, vasomotor rhinitis
       • Sinusitis–acute or chronic bacterial
     • Gastrointestinal:
       • GERD–nocturnal cough, cough after meals, lying flat worsens, “silent reflux” possible
     • Cardiac:
       • Heart failure–pulmonary edema, pink frothy sputum†
       • Pulmonary embolism–sudden onset cough, pleuritic chest pain, dyspnea, hemoptysis†
  2. Asks about aggravating factors–what makes cough worse
     • “What makes your cough worse?”
     • Environmental:
       • Cold air–asthma, reactive airway disease
       • Dry air–irritation, dehydration of airways
       • Dust/pollen–allergic triggers
       • Smoke–tobacco, wildfire, secondhand smoke
       • Strong odors–perfumes, cleaning products (asthma, reactive airway)
     • Positional:
       • Lying flat–GERD, post-nasal drip, heart failure
       • Supine at night–asthma (circadian), GERD
       • Bending over–GERD, abdominal pressure
     • Activities:
       • Exercise–exercise-induced bronchospasm (asthma), cardiac dyspnea
       • Talking–laryngeal irritation, vocal cord dysfunction
       • Deep breathing–pleuritic (pneumonia, pleuritis, PE)
     • Eating/drinking:
       • Large meals–GERD (increased abdominal pressure)
       • Specific foods–acidic, spicy, fatty (GERD)
       • Drinking–cold liquids (asthma), aspiration risk (dysphagia)†
  3. Asks about maintaining factors–what perpetuates cough
     • “What keeps your cough from getting better?”
     • Ongoing exposure:
       • Continued smoking–most important modifiable factor
       • Persistent allergens–dust, mold, pets in home
       • Occupational exposure–continued workplace irritants
     • Untreated underlying conditions:
       • Undiagnosed or undertreated asthma
       • Unrecognized GERD–”silent reflux,” not taking acid suppression
       • Persistent post-nasal drip–untreated allergic rhinitis, chronic sinusitis
       • Untreated heart failure–ongoing pulmonary congestion
       • ACE inhibitor continuation–not recognized as cause
     • Post-infectious:
       • Airway hyperreactivity–persists weeks after viral infection (post-viral cough)
       • Damaged airway epithelium–slow healing, prolonged irritation
     • Behavioral:
       • Poor medication adherence–not taking prescribed inhalers, acid suppression
       • Inadequate hydration–thick secretions harder to clear
  4. Asks about relieving factors–what makes cough better
     • “What helps your cough?”
     • Medications:
       • Cough suppressants–dextromethorphan, benzonatate
       • Bronchodilators–albuterol (asthma, COPD, bronchospasm)
       • Inhaled corticosteroids–asthma, chronic cough from airway inflammation
       • Antihistamines–post-nasal drip, allergic rhinitis
       • Intranasal corticosteroids–post-nasal drip, allergic rhinitis, chronic sinusitis
       • Proton pump inhibitors (PPIs)–GERD (may take 2-3 months for cough to improve)
       • ACE inhibitor cessation–switch to ARB if cough from ACE inhibitor
     • Non-pharmacologic:
       • Hydration–fluids, water, warm liquids
       • Honey–natural cough suppressant (not for infants <1 year)
       • Humidifier–adds moisture to air, loosens secretions
       • Head elevation–sleeping with head elevated (GERD, post-nasal drip)
       • Avoiding triggers–cold air, smoke, allergens, irritants
       • Smoking cessation–single most important intervention for chronic cough
     • Specific treatments:
       • Asthma–inhaled corticosteroids + bronchodilators
       • GERD–PPIs + lifestyle (avoid triggers, elevate head of bed, weight loss)
       • Post-nasal drip–intranasal steroids + antihistamines + saline irrigation
       • Heart failure–diuretics
     • “Nothing helps”:
       • Consider unrecognized cause (GERD, post-nasal drip, asthma)
       • Consider malignancy, TB, other serious pathology†

• 16.4Accompanying Symptoms & Circumstances Heuristic

  1. Asks about accompanying symptoms–associated symptoms for differential diagnosis
     • “What other symptoms do you have with your cough?”
     • Constitutional symptoms:
       • Fever–infection (pneumonia, bronchitis, TB, COVID-19)†
       • Night sweats–TB, lymphoma, chronic infection†
       • Weight loss–malignancy, TB, chronic infection, COPD†
       • Fatigue–chronic illness, infection, malignancy
       • Loss of appetite–infection, malignancy
     • Respiratory symptoms:
       • Dyspnea–shortness of breath (pneumonia, COPD, asthma, heart failure, PE, interstitial lung disease)†
       • Hemoptysis–coughing up blood (TB, lung cancer, bronchiectasis, pneumonia, PE)†
       • Wheezing–audible wheeze (asthma, COPD, bronchitis, heart failure)
       • Chest pain–pleuritic (sharp with breathing/cough) vs. non-pleuritic†
       • Stridor–inspiratory high-pitched sound (upper airway obstruction)†
     • Upper respiratory symptoms:
       • Post-nasal drip–sensation of mucus dripping down back of throat (most common cause chronic cough)
       • Nasal congestion–stuffy nose (allergic rhinitis, sinusitis, URI)
       • Sinus pressure/pain–frontal, maxillary (sinusitis)
       • Sore throat–pharyngitis, post-nasal drip, GERD
       • Hoarseness–laryngitis, GERD, vocal cord pathology, laryngeal cancer†
     • Gastrointestinal symptoms:
       • Heartburn–burning chest discomfort (GERD)
       • Regurgitation–acid/food coming back up (GERD)
       • Sour/bitter taste–acid reflux
       • Dysphagia–difficulty swallowing (aspiration risk, esophageal pathology)†
     • Cardiovascular symptoms:
       • Orthopnea–dyspnea when lying flat (heart failure)†
       • Paroxysmal nocturnal dyspnea–waking with severe dyspnea (heart failure)†
       • Bilateral lower extremity edema–heart failure
       • Pink frothy sputum–pulmonary edema†
     • Other symptoms:
       • Urinary incontinence–stress incontinence with coughing
       • Rib/chest wall pain–musculoskeletal from excessive coughing
       • Post-tussive vomiting–pertussis, severe cough
  2. Asks about life circumstances–social and occupational context
     • “Tell me about your living and work environment.”
     • Smoking and substance use:
       • Smoking status–current, former, never
       • Pack-years–(packs per day) × (years smoked)
       • Quit date if former smoker
       • Secondhand smoke exposure
       • Vaping/e-cigarettes–EVALI risk
       • Marijuana–smoking, vaping
     • Occupational factors:
       • Work exposure–dust, fumes, chemicals, asbestos, silica, grain dust, animals, birds
       • Work environment–indoor air quality, ventilation, mold
       • Protective equipment–respirators, masks
       • Work-related pattern–better on weekends/vacations suggests occupational asthma
     • Home environment:
       • Mold, dampness, water damage
       • Pets, birds, feather pillows
       • Dust, cockroaches
       • Heating–wood-burning stove, fireplace (particulate exposure)
       • Recent renovations or changes
     • Social context:
       • Living situation–crowded housing (TB transmission)
       • Sick contacts–family, coworkers with respiratory illness
       • Recent travel–TB-endemic areas, fungal endemic regions
       • Childcare/school–children exposing adults to respiratory viruses
     • Red flag life circumstances:
       • Homeless + chronic cough–TB risk†
       • Incarceration + chronic cough–TB risk†
       • Healthcare worker + chronic cough–TB exposure†
       • Immunocompromised + cough + fever–opportunistic infections†
       • Heavy smoker + chronic cough + weight loss–lung cancer concern†
     • Functional status:
       • Work capacity–able to work, limited by cough
       • Sleep quality–disruption from cough
       • Quality of life–overall impact of persistent cough

• 16.5Red Flags & Interconnectedness

  Red Flags–Require immediate or urgent evaluation

  Emergency presentations

  • Cough + severe dyspnea at rest + hypoxia–respiratory failure†
  • Cough + hemoptysis + massive bleeding (>100 mL)–life-threatening hemorrhage†
  • Cough + stridor + drooling + respiratory distress–upper airway obstruction†
  • Cough + sudden onset + choking episode–foreign body aspiration†
  • Cough + chest pain + sudden dyspnea + unilateral leg swelling–pulmonary embolism†
  • Cough + pink frothy sputum + orthopnea + edema–acute pulmonary edema†

  High-risk presentations

  • Chronic cough >8 weeks + hemoptysis–lung cancer, TB, bronchiectasis†
  • Chronic cough + unintentional weight loss >10 lbs (5 kg) + night sweats–TB, lung cancer, lymphoma†
  • Chronic cough + smoking history >20 pack-years + age >40–lung cancer screening needed†
  • Chronic cough + fever + night sweats + TB risk factors–tuberculosis†
  • Cough + hoarseness >3 weeks–vocal cord paralysis, laryngeal cancer†
  • Cough + dysphagia–aspiration risk, esophageal pathology†
  • Cough + immunocompromised + fever–opportunistic infections†
  • Recurrent pneumonia (≥2 episodes)–underlying cause (bronchiectasis, malignancy, aspiration, immunodeficiency)†

  Age-specific red flags

  • Child + barking cough + stridor–croup vs. epiglottitis†
  • Infant + paroxysmal cough + inspiratory whoop–pertussis (apnea risk)†
  • Elderly + new cough + confusion–pneumonia (atypical presentation)†

  Interconnectedness

  Not to be missed

  • Lung cancer: chronic cough + hemoptysis + weight loss + smoking history >20 pack-years + age >40 + hoarseness

  Complaint patterns

  • Upper airway cough syndrome (UACS): cough + post-nasal drip + throat clearing + nasal congestion + sinus pressure (most common cause chronic cough)
  • GERD-induced cough: cough + heartburn + regurgitation + worse lying down + worse after meals + nocturnal cough (“silent reflux” possible)
  • Cough-variant asthma: cough + wheezing + dyspnea + chest tightness + nocturnal symptoms + exercise-induced (cough as predominant symptom)
  • ACE inhibitor cough: chronic dry cough + taking ACE inhibitor (lisinopril, enalapril, ramipril) + no other cause found
  • Pneumonia: acute cough + fever + dyspnea + pleuritic chest pain + productive sputum (rust-colored = pneumococcal)
  • Tuberculosis: chronic cough >3 weeks + hemoptysis + night sweats + weight loss + fever + TB risk factors
  • Pertussis: subacute cough 3-8 weeks + paroxysmal coughing fits + inspiratory whoop + post-tussive vomiting + no fever
  • COPD/chronic bronchitis: chronic cough + productive sputum + dyspnea + smoking history + wheezing (sputum ≥3 months/year for ≥2 years)
  • Heart failure: cough + dyspnea + orthopnea + PND + pink frothy sputum + bilateral edema
  • Pulmonary embolism: sudden cough + dyspnea + pleuritic chest pain + hemoptysis + unilateral leg swelling + risk factors
  • Bronchiectasis: chronic productive cough + copious purulent sputum + recurrent infections + hemoptysis + clubbing
  • Aspiration pneumonia: cough + dysphagia + choking episodes + foul-smelling sputum + stroke history

  Specific syndrome patterns

  • Smoker age >40 + chronic cough + hemoptysis + weight loss + hoarseness–lung cancer†
  • Patient + chronic cough + heartburn + nocturnal cough + no response to cough meds–GERD-induced cough
  • Patient + chronic cough + post-nasal drip + throat clearing + nasal congestion–upper airway cough syndrome
  • Patient + chronic dry cough + taking lisinopril + started 2 months ago–ACE inhibitor cough
  • Patient + nocturnal cough + wheezing + chest tightness + exercise-induced–cough-variant asthma
  • Patient + acute cough + fever + dyspnea + pleuritic pain + rusty sputum–pneumococcal pneumonia
  • Patient + chronic cough >3 weeks + night sweats + weight loss + hemoptysis + homeless–tuberculosis†
  • Patient + paroxysmal cough + inspiratory whoop + post-tussive vomiting + 6 weeks duration–pertussis

17--Hemoptysis

• 17.1Complaint Heuristic

  1. Asks about the nature of hemoptysis
     • “Tell me about the blood you’re coughing up. What does it look like?”
     • Nature of blood:
       • Coughing up blood–blood expelled from respiratory tract during coughing
       • Streaks of blood–small amounts mixed with sputum
       • Blood-tinged sputum–sputum with blood streaking
       • Frank blood–pure blood without sputum
       • Clots–blood clots coughed up
     • Color:
       • Bright red–fresh blood (active bleeding, alveolar hemorrhage)
       • Dark red or brown–older blood (cavitary lesion, bronchiectasis)
       • Pink frothy–mixed with fluid (pulmonary edema)†
       • Rust-colored–classic for pneumococcal pneumonia
     • Consistency:
       • Liquid blood
       • Clotted blood
       • Mixed with mucus or pus
       • Frothy–alveolar hemorrhage, pulmonary edema
     • Distinguishing from other sources:
       • Hemoptysis (lung/airway)–coughed up, bright red, frothy, alkaline pH, mixed with sputum
       • Hematemesis (GI)–vomited, dark red/brown, coffee-ground, acidic pH, mixed with food
       • Epistaxis (nose)–blood dripping from nose, felt in nasopharynx, not coughed up
       • Oropharyngeal–blood from gums, tongue, throat, no cough required
  2. Asks about the intensity of hemoptysis
     • “How much blood are you coughing up? How is it affecting you?”
     • Clinical severity:
       • Scant/streaking–small streaks in sputum
       • Mild–small amounts, not interfering with breathing
       • Moderate–noticeable blood, causing concern
       • Severe–large amounts, difficulty breathing, distress†
       • Massive (>100 mL single episode or >300 mL/24 hours)–emergency, risk of asphyxiation†
     • Volume quantification:
       • Mild–<5 tablespoons (75 mL) in 24 hours
       • Moderate–5-20 tablespoons (75-300 mL) in 24 hours
       • Massive–>20 tablespoons (>300 mL) in 24 hours OR >100 mL in single episode†
     • Practical measurement:
       • Number of episodes
       • Tablespoons, teaspoons, cups (1 tablespoon = ~15 mL, 1 cup = ~240 mL)
       • Blood-tinged tissues–how many tissues soaked
       • Time frame–per episode, per hour, per 24 hours
     • Functional impact:
       • Hemoptysis interfering with breathing or causing hypoxia†
       • Recurrent small hemoptysis over weeks–warrants investigation
       • Single episode, small amount–may observe if low-risk patient
  3. Asks about localization–source location
     • “Where do you feel the blood is coming from?”
     • Sensation of origin:
       • Deep in chest–lower airways, lung parenchyma
       • Upper chest/throat–trachea, bronchi
       • One side of chest–unilateral lung pathology
       • Cannot localize
     • Lateralization:
       • Left-sided chest sensation–left lung pathology
       • Right-sided chest sensation–right lung pathology
       • Bilateral or diffuse–alveolar hemorrhage, pulmonary edema, widespread disease
     • Associated sensations:
       • Bubbling or gurgling in chest before coughing
       • Warmth or sensation of fluid in airway
       • Tickling or irritation in specific area
  4. Asks about shifts and radiation–changes in hemoptysis pattern
     • “Has the bleeding changed since it started?”
     • Migration patterns (temporal):
       • Started as blood-tinged sputum, progressed to frank blood†
       • Increasing volume over hours or days–worsening bleeding†
       • Decreasing volume–improving or self-limited
       • Intermittent episodes with periods of no bleeding
       • Initially scant, now massive†
       • Color changes–bright red → dark brown (evolving)
     • Spatial changes:
       • Started unilateral, now bilateral

• 17.2Time-Intensity Heuristic

  1. Asks about onset–when hemoptysis started
     • “When did you first notice coughing up blood?”
     • Timing:
       • Sudden onset (within minutes to hours)–PE, bronchial artery rupture, trauma, foreign body†
       • Acute onset (hours to days)–pneumonia, bronchitis, PE
       • Subacute onset (days to weeks)–tuberculosis, fungal infection, bronchiectasis
       • Chronic recurrent (months to years)–bronchiectasis, chronic bronchitis, bronchogenic carcinoma†
     • Precipitating events:
       • After trauma–pulmonary contusion, rib fracture, iatrogenic (bronchoscopy, biopsy)†
       • After upper respiratory infection–post-infectious bronchitis
       • After vigorous coughing–airway mucosal irritation
       • Following anticoagulation initiation or increase
       • No clear precipitant
  2. Asks about course over time–evolution since onset
     • “How has the blood in your sputum changed over time?”
     • Duration:
       • Acute–single episode or <1 week (infection, PE, trauma)
       • Subacute–1-3 weeks (tuberculosis, fungal infection)
       • Chronic–>3 weeks (malignancy, bronchiectasis, chronic infection)†
     • Progression:
       • Worsening–increasing volume, frequency (progression of underlying disease, malignancy, expanding infection)†
       • Stable–same amount, intermittent episodes (chronic bronchitis, bronchiectasis)
       • Improving–decreasing volume (resolving infection, effective treatment)
       • Resolved–no further bleeding after initial episode
     • Recurrence pattern:
       • Single isolated episode–often benign bronchitis
       • Daily episodes–active disease (TB, malignancy)†
       • Intermittent–episodes separated by days or weeks (bronchiectasis, recurrent infection)
  3. Asks about course during day–pattern over 24 hours
     • “Is there a pattern to when you cough up blood during the day?”
     • Diurnal patterns:
       • Worse in morning–overnight accumulation of blood in airways (bronchiectasis, chronic bronchitis)
       • Constant throughout day–active bleeding
       • Worse after lying down–pooling in dependent lung areas
       • Worse with activity–increased pulmonary blood flow
     • Positional influence:
       • Worse lying on specific side–bleeding from that lung
       • Better sitting upright
       • Worse supine
  4. Asks about frequency–pattern of hemoptysis episodes
     • “How often are you coughing up blood?”
     • Episode frequency:
       • Single episode–may be self-limited (bronchitis)
       • Multiple episodes per day–active disease†
       • Intermittent over weeks–chronic pathology (bronchiectasis)
       • Recurrent over months to years–bronchiectasis, chronic bronchitis
     • Comparison to prior:
       • First episode ever–requires investigation
       • More frequent than prior–worsening disease†
       • Same pattern as previous–stable chronic condition
       • More severe than prior–disease progression†

• 17.3Triggering & Modifying Factors Heuristic

  1. Asks about triggering factors–what initiated the hemoptysis
     • “What do you think might have triggered the bleeding?”
     • Infectious exposures:
       • Tuberculosis exposure–travel to/residence in TB-endemic areas, close contact with known TB case†
       • Homelessness, incarceration, crowded living–TB risk†
       • Healthcare work–TB exposure†
       • Immunocompromised–HIV, transplant, immunosuppressive medications†
       • Fungal exposures–geographic areas (histoplasmosis, coccidioidomycosis, aspergillosis)
       • Recent upper respiratory infection–post-infectious bronchitis, pneumonia
     • Trauma & iatrogenic:
       • Chest trauma–blunt or penetrating (pulmonary contusion, laceration)†
       • Recent procedures–bronchoscopy, transbronchial biopsy, lung biopsy, central line placement†
       • Prolonged intubation–airway trauma
     • Medications & anticoagulation:
       • Anticoagulants–warfarin (INR level), DOACs (rivaroxaban, apixaban, dabigatran), heparin
       • Antiplatelet agents–aspirin, clopidogrel, NSAIDs
       • Thrombolytics–recent administration
       • Chemotherapy–bevacizumab (anti-VEGF, increased bleeding risk)
       • Cocaine–nasal or inhaled (pulmonary hemorrhage)†
     • Occupational & environmental:
       • Silica dust–sandblasting, mining, quarrying (silicosis predisposes to TB)
       • Asbestos exposure–shipbuilding, construction, insulation work
       • Heavy metal exposure, welding fumes
     • Substance use:
       • Tobacco smoking–pack-years (increases cancer, chronic bronchitis risk)
       • Cocaine inhalation–direct pulmonary toxicity, alveolar hemorrhage†
       • E-cigarettes, vaping–EVALI can cause hemorrhage
     • Underlying conditions:
       • Known lung disease–COPD, bronchiectasis, cystic fibrosis
       • Heart disease–mitral stenosis (pulmonary venous hypertension)
       • Connective tissue disease–lupus, Wegener’s granulomatosis, Goodpasture’s syndrome†
       • Known malignancy–lung cancer, metastases†
  2. Asks about aggravating factors–what makes hemoptysis worse
     • “What makes the bleeding worse?”
     • Activity:
       • Physical exertion–increased pulmonary blood flow
       • Vigorous coughing–airway trauma, disrupts clots
     • Medications:
       • Anticoagulants, antiplatelets–increase bleeding
       • NSAIDs
     • Position:
       • Lying on affected side–increased blood flow to that lung
       • Supine position
     • Other:
       • Increased blood pressure–hypertensive crisis
       • Valsalva maneuvers–straining, heavy lifting
  3. Asks about maintaining factors–what perpetuates hemoptysis
     • “What do you think keeps the bleeding going?”
     • Ongoing disease:
       • Untreated infection–TB, pneumonia, abscess
       • Progressive malignancy
       • Continued anticoagulation–when necessary for other conditions
       • Uncontrolled underlying disease–bronchiectasis, vasculitis
     • Lifestyle factors:
       • Continued smoking
       • Cocaine use
       • Occupational exposure cannot be avoided
     • Medical factors:
       • Poor treatment adherence
       • Inadequate antibiotic dosing or duration
       • Anticoagulation necessary for other conditions–DVT, PE, atrial fibrillation, mechanical valve
  4. Asks about relieving factors–what makes hemoptysis better
     • “What makes the bleeding better or stop?”
     • Medications:
       • Antibiotics–improvement over days (pneumonia, TB)
       • Antifungals–gradual improvement (fungal infection)
       • Reversal of anticoagulation–vitamin K, FFP for warfarin; specific reversal agents for DOACs
       • Tranexamic acid–antifibrinolytic agent
     • Interventions:
       • Bronchoscopy with cauterization or endobronchial therapy
       • Bronchial artery embolization–for massive hemoptysis
       • Surgical resection–localized bleeding source
     • Position:
       • Sitting upright
       • Lying on bleeding side–to protect unaffected lung
     • Lifestyle:
       • Smoking cessation
       • Avoiding vigorous coughing–gentle cough techniques
       • Rest
     • Treatment of underlying cause:
       • Tumor resection or radiation
       • TB treatment–resolution over weeks to months
       • Heart failure management–reduces pulmonary venous pressure

• 17.4Accompanying Symptoms & Circumstances Heuristic

  1. Asks about accompanying symptoms–associated symptoms for differential diagnosis
     • “What other symptoms do you have with the blood you’re coughing up?”
     • Respiratory symptoms:
       • Chronic cough >3 weeks–TB, malignancy, bronchiectasis†
       • Productive cough–purulent sputum (infection), copious purulent (bronchiectasis), foul-smelling (lung abscess)†
       • Dyspnea–shortness of breath (PE, pneumonia, massive hemoptysis, pulmonary edema)†
       • Pleuritic chest pain–sharp, worse with breathing/coughing (PE, pneumonia, pulmonary infarction)†
       • Wheezing–airway obstruction from clot, tumor, or underlying COPD/asthma
     • Constitutional symptoms:
       • Fever–pneumonia, TB, lung abscess, endocarditis with septic emboli†
       • Weight loss–malignancy, TB, chronic infection (quantify: >10 lbs/5 kg in 3 months)†
       • Night sweats–TB, lymphoma, endocarditis (drenching, requiring clothing change)†
       • Fatigue–chronic infection, malignancy, anemia from blood loss
     • Cardiovascular symptoms:
       • Unilateral leg swelling–DVT → PE risk†
       • Bilateral leg edema–heart failure, cor pulmonale
       • Palpitations–associated with dyspnea (PE causing strain)
       • Syncope or presyncope–massive PE, severe hypoxia†
     • Other system symptoms:
       • Epistaxis–rule out nasal source of bleeding
       • Hematuria–pulmonary-renal syndromes (Goodpasture’s, granulomatosis with polyangiitis)†
       • Joint pain, swelling–vasculitis, connective tissue disease
       • Rash, purpura–vasculitis, bleeding disorder
       • Hoarseness–vocal cord involvement, recurrent laryngeal nerve compression
  2. Asks about life circumstances–social and occupational context
     • “Tell me about your smoking history, work, and any recent travel.”
     • Tobacco use:
       • Current smoking status
       • Pack-years–(packs per day) × (years smoked)
       • Heavy smoking (>20-30 pack-years)–significantly increases lung cancer risk†
       • Quit date if former smoker
       • E-cigarettes, vaping
     • Substance use:
       • Cocaine–intranasal, inhalational (crack), IV (pulmonary hemorrhage)†
       • Alcohol–chronic use (liver disease, coagulopathy)
       • Injection drug use–endocarditis risk†
     • Occupational history:
       • Asbestos exposure–shipbuilding, construction, insulation (mesothelioma, lung cancer, asbestosis)
       • Silica dust–mining, sandblasting, quarrying (silicosis, increased TB risk)
       • Coal dust–coal mining (coal worker’s pneumoconiosis)
       • Healthcare work–TB exposure
     • Travel history:
       • TB-endemic areas–Asia, Sub-Saharan Africa, Latin America, Eastern Europe†
       • Fungal-endemic areas–Southwestern US (coccidioidomycosis), Ohio/Mississippi River valleys (histoplasmosis)
       • Duration and activities during travel
     • Living situation:
       • Homelessness, shelters–TB risk†
       • Incarceration history–TB risk†
       • Crowded living conditions
     • Functional status:
       • Activity level, exercise tolerance
       • Independence in daily activities
       • Impact of symptoms on life

• 17.5Red Flags & Interconnectedness

  Red Flags–Require immediate or urgent evaluation

  Emergency presentations

  • Massive hemoptysis (>100 mL single episode or >300 mL/24 hours)–airway protection, ICU†
  • Hemoptysis + sudden dyspnea + pleuritic chest pain–pulmonary embolism†
  • Hemoptysis + hypotension or shock–massive bleeding, PE†
  • Hemoptysis + altered mental status–hypoxia, massive bleeding†
  • Hemoptysis interfering with breathing or causing hypoxia†

  High-risk presentations

  • Hemoptysis + weight loss + chronic cough–lung cancer, tuberculosis†
  • Hemoptysis + fever + night sweats–tuberculosis, lung abscess†
  • Hemoptysis + hematuria–pulmonary-renal syndrome (Goodpasture’s, vasculitis)†
  • Hemoptysis in immunocompromised patient–opportunistic infection, invasive fungal disease†
  • Heavy smoker (>20-30 pack-years) + age >40 + hemoptysis–lung cancer until proven otherwise†

  Trauma/iatrogenic red flags

  • Hemoptysis immediately after chest trauma–pulmonary contusion†
  • Massive hemoptysis post-bronchoscopy or biopsy†

  Interconnectedness

  Not to be missed

  • Pulmonary embolism: sudden dyspnea + pleuritic chest pain + hemoptysis + unilateral leg swelling + risk factors (surgery, immobilization, malignancy)

  Complaint patterns

  • Pulmonary embolism (PE): sudden dyspnea + pleuritic chest pain + hemoptysis + tachycardia + DVT risk factors
  • Tuberculosis (TB): chronic cough >3 weeks + hemoptysis + fever + night sweats + weight loss + TB exposure or endemic area
  • Lung cancer: hemoptysis + chronic cough + unintentional weight loss >10 lbs (5 kg) + heavy smoking history + chest pain + dyspnea + age >40-50
  • Pneumonia: acute hemoptysis + fever + productive cough + pleuritic chest pain + rust-colored sputum (pneumococcal)
  • Bronchiectasis: recurrent hemoptysis episodes + chronic productive cough with copious purulent sputum + morning cough + clubbing
  • Aspergilloma: hemoptysis in patient with pre-existing lung cavity (prior TB, sarcoidosis) + “air crescent sign” on imaging
  • Goodpasture’s syndrome: hemoptysis + hematuria + rapidly progressive glomerulonephritis + young men typically
  • Granulomatosis with polyangiitis (Wegener’s): hemoptysis + hematuria + sinusitis + nasal crusting + c-ANCA positive
  • Mitral stenosis: hemoptysis + dyspnea + orthopnea + history of rheumatic fever + opening snap, diastolic rumble
  • Pulmonary contusion: hemoptysis immediately after blunt chest trauma + rib fractures + hypoxia
  • Anticoagulation-related: hemoptysis in patient on warfarin/DOACs + may reveal underlying pathology

  Specific syndrome patterns

  • Patient + sudden dyspnea + pleuritic chest pain + hemoptysis + unilateral leg swelling–pulmonary embolism†
  • Patient + chronic cough >3 weeks + hemoptysis + night sweats + weight loss + TB exposure–tuberculosis†
  • Heavy smoker >20 pack-years + age >40 + hemoptysis + weight loss + chronic cough–lung cancer†
  • Patient + acute hemoptysis + fever + pleuritic pain + rust-colored sputum–pneumococcal pneumonia
  • Patient + recurrent hemoptysis + chronic productive cough + copious purulent sputum + clubbing–bronchiectasis
  • Patient + hemoptysis + hematuria + renal failure + young male–Goodpasture’s syndrome†
  • Patient + hemoptysis + hematuria + sinusitis + nasal crusting–granulomatosis with polyangiitis†
  • Patient + hemoptysis after chest trauma + rib pain + hypoxia–pulmonary contusion†

18GASTROINTESTINAL SYSTEM

• 18.1Complaint Heuristic

• 18.2Time-Intensity Heuristic

• 18.3Triggering & Modifying Heuristic

• 18.4Accompanying Symptoms & Circumstances Heuristic

• 18.5Red Flags & Interconnectedness

  Complaint Heuristic

  Time-Intensity Heuristic

  Triggering & Modifying Heuristic

  Accompanying Symptoms & Circumstances Heuristic

  Red Flags & Interconnectedness

19--Abdominal Pain

• 19.1Complaint Heuristic

  1. Asks about the nature of abdominal pain
     • “Tell me about your pain. What does it feel like?”
     • Visceral pain (organ distension, inflammation):
       • Dull, aching, cramping, gnawing–hollow organ distension, ischemia, inflammation
       • Poorly localized, diffuse, “deep” sensation
       • Often associated with nausea, vomiting, diaphoresis
     • Somatic/Parietal pain (peritoneal irritation):
       • Sharp, well-localized, constant–peritoneal inflammation†
       • Worse with movement, coughing, breathing
       • Patient lies still–peritonitis†
     • Colicky pain (rhythmic, intermittent):
       • Waves of cramping pain with pain-free intervals
       • Patient writhes, cannot find comfortable position
       • Bowel obstruction, biliary colic, renal colic, early appendicitis
     • Referred pain:
       • Shoulder pain–diaphragm irritation (subphrenic abscess, splenic rupture)†
       • Back pain–retroperitoneal structures (pancreatitis, AAA)†
       • Testicular/groin pain–ureteral colic
     • Other pain qualities:
       • Burning–epigastric (GERD, peptic ulcer, gastritis), diffuse (peritonitis)
       • Tearing/ripping–AAA rupture, aortic dissection†
  2. Asks about the intensity of abdominal pain
     • “How severe is the pain? How is it affecting you?”
     • Functional impact:
       • Cannot move, lies perfectly still–peritonitis†
       • Writhes, cannot get comfortable–colic (renal, biliary)
       • Interferes with daily activities–significant pathology
       • Minimal interference–functional, dyspepsia
     • Behavioral indicators:
       • Pain out of proportion to exam–mesenteric ischemia (classic)†
       • Patient position: Still (peritonitis) vs. restless (colic)
     • Progression pattern:
       • Rapidly worsening–perforation, ischemia, strangulation†
       • Gradual worsening–appendicitis, cholecystitis
       • Waxing and waning–colic (biliary, renal, bowel obstruction)
       • Constant, unrelenting–peritonitis, ischemia†
     • Severity level:
       • 10/10 “worst pain ever”–AAA rupture, mesenteric ischemia, perforated viscus, kidney stone†
       • 7-9/10–appendicitis, pancreatitis, cholecystitis, bowel obstruction
       • 4-6/10–gastritis, peptic ulcer, diverticulitis, early appendicitis
       • 1-3/10–dyspepsia, IBS, functional pain
  3. Asks about localization of abdominal pain
     • “Where exactly is the pain? Can you point to it?”
     • Right Upper Quadrant (RUQ):
       • Biliary–cholecystitis, biliary colic, choledocholithiasis, cholangitis†
       • Hepatic–hepatitis, liver abscess, hepatic congestion
       • Pulmonary–right lower lobe pneumonia, pulmonary embolism†
     • Epigastric:
       • Gastric–peptic ulcer, gastritis, gastric cancer
       • Pancreatic–pancreatitis (radiates to back)
       • Cardiac–inferior MI (can present as epigastric pain)†
       • Vascular–AAA (pulsatile mass), mesenteric ischemia†
     • Periumbilical:
       • Early appendicitis–visceral pain before localizing to RLQ
       • Small bowel–obstruction, gastroenteritis, early mesenteric ischemia†
       • Vascular–AAA (periumbilical/back pain)†
     • Right Lower Quadrant (RLQ):
       • Appendicitis–McBurney’s point†
       • Gynecologic–ovarian cyst/torsion, ectopic pregnancy, PID†
       • Urologic–ureteral stone, UTI
       • GI–Crohn’s disease, cecal diverticulitis
     • Left Lower Quadrant (LLQ):
       • Diverticulitis–”left-sided appendicitis” in elderly
       • Gynecologic–ovarian cyst/torsion, ectopic pregnancy, PID†
       • GI–sigmoid volvulus, colorectal cancer, IBD
     • Diffuse/Generalized:
       • Peritonitis–perforated viscus, advanced appendicitis†
       • Mesenteric ischemia–diffuse with pain out of proportion to exam†
       • Bowel obstruction–initially periumbilical, becomes diffuse
  4. Asks about shifts and radiation of pain
     • “Has the pain moved or spread since it started?”
     • Migration patterns (temporal):
       • Appendicitis–periumbilical → RLQ over 12-24 hours (classic migratory pain)†
       • Biliary colic/cholecystitis–epigastric → RUQ over hours
       • Perforated ulcer–epigastric → diffuse as peritonitis develops†
       • Aortic dissection/AAA–chest/epigastric → migrates down†
     • Radiation patterns (spatial):
       • Biliary colic/cholecystitis–RUQ radiates to right scapula, right shoulder
       • Pancreatitis–epigastric radiates straight through to back, “boring” quality
       • Renal colic–flank radiates to groin, testicle/labia
       • Aortic dissection/AAA–chest/epigastric radiates to back, between shoulder blades†
       • Ruptured ectopic/perforated ulcer–shoulder pain from diaphragm irritation†

• 19.2Time-Intensity Heuristic

  1. Asks about onset–when abdominal pain started
     • “When did the pain start? How did it begin?”
     • Sudden onset (seconds to minutes):
       • Vascular catastrophe–AAA rupture, mesenteric artery occlusion†
       • Perforation–perforated ulcer, perforated diverticulitis†
       • Torsion–ovarian torsion, testicular torsion†
       • Rupture–ectopic pregnancy rupture, splenic rupture†
       • Colic–renal colic (stone impaction), biliary colic
     • Rapid onset (minutes to hours):
       • Appendicitis–develops over hours
       • Cholecystitis–often post-prandial onset
       • Pancreatitis–develops over hours after trigger
       • Bowel obstruction–progressive over hours
     • Gradual onset (hours to days):
       • Appendicitis–classic 24-48 hour evolution
       • Diverticulitis–develops over 1-3 days
       • Cholecystitis–may smolder for days
       • Hepatitis–develops over days
     • Chronic/Recurrent (weeks to months):
       • Peptic ulcer–recurrent episodes
       • IBD–flares and remissions
       • IBS–chronic recurring pattern
       • Malignancy–progressive over weeks to months†
  2. Asks about course over time–evolution since onset
     • “How has the pain changed since it started?”
     • Worsening:
       • Rapidly worsening over hours–perforation, ischemia, strangulated hernia, appendicitis progressing to perforation†
       • Steadily worsening over days–cholecystitis, diverticulitis, abscess formation
     • Improving:
       • Resolving–viral gastroenteritis, passed stone, resolved colic
       • Intermittent with remissions–IBD, IBS, peptic ulcer disease
     • Constant/Unchanging:
       • Peritonitis–once established, constant†
       • Malignancy–persistent, progressive†
     • Episodic/Intermittent:
       • Biliary colic–episodes lasting 1-4 hours, then resolution
       • IBS–recurrent episodes
       • Peptic ulcer–meal-related pattern
  3. Asks about course during day–diurnal pattern
     • “Is there a pattern to when the pain occurs during the day?”
     • Meal-related patterns:
       • Worse with eating–gastric ulcer (food → acid), mesenteric ischemia (“intestinal angina”), biliary colic (fatty foods), pancreatitis†
       • Better with eating–duodenal ulcer (food buffers acid)
       • Worse 30-60 minutes after eating–biliary colic, mesenteric ischemia
       • Worse 2-3 hours after eating–duodenal ulcer (food cleared, acid present)
     • Time of day:
       • Night pain waking from sleep–duodenal ulcer (classic), pancreatitis, malignancy†
       • Morning stiffness/pain–IBD
       • End of day worsening–functional pain, stress-related
     • Relationship to defecation:
       • Better after bowel movement–IBS, constipation
       • Worse with bowel movement–proctitis, anal fissure
       • Urge with pain–IBD, IBS
  4. Asks about frequency–pattern of pain episodes
     • “How often does the pain occur?”
     • Single acute episode:
       • Appendicitis, cholecystitis, pancreatitis, perforation
       • Requires workup to determine cause
     • Recurrent episodes (similar pattern):
       • Biliary colic–until cholecystectomy
       • Renal colic–recurrent stones
       • Peptic ulcer–until treated
       • IBD flares
     • Chronic daily/near-daily:
       • IBS
       • Functional dyspepsia
       • Chronic pancreatitis
       • Malignancy (late)†

• 19.3Triggering & Modifying Factors Heuristic

  1. Asks about triggering factors–what initiated the pain
     • “What do you think triggered the pain?”
     • Food-related triggers:
       • Fatty foods–biliary colic, cholecystitis, pancreatitis
       • Alcohol–pancreatitis, gastritis
       • Spicy foods–gastritis, peptic ulcer
       • Large meals–GERD, biliary colic, mesenteric ischemia†
       • Specific foods–food allergies, lactose intolerance, celiac disease
     • Medication triggers:
       • NSAIDs/Aspirin–gastritis, peptic ulcer, GI bleeding†
       • Antibiotics (recent)–C. difficile colitis†
       • Opioids–constipation, narcotic bowel syndrome
       • Iron supplements–constipation, GI upset
     • Activity triggers:
       • Exertion–mesenteric ischemia (“intestinal angina”)†
       • Straining–hernia incarceration†
       • Trauma–splenic rupture, hollow viscus injury, solid organ injury†
     • Other triggers:
       • Stress–IBS, functional dyspepsia
       • Menstruation–endometriosis, mittelschmerz
       • Sexual activity–PID, ruptured ovarian cyst†
       • Recent travel–infectious diarrhea, parasites
       • Recent hospitalization–C. difficile†
  2. Asks about aggravating factors–what makes pain worse
     • “What makes the pain worse?”
     • Movement:
       • Worse with any movement–peritonitis (patient lies still)†
       • Jarring, coughing, deep breathing–peritoneal irritation†
     • Position:
       • Worse lying flat–pancreatitis (better sitting forward), GERD
       • Worse standing/walking–appendicitis (splinting)
     • Eating:
       • Worse with eating–gastric ulcer, mesenteric ischemia, biliary colic (fatty), pancreatitis
     • Palpation:
       • Rebound tenderness–peritonitis†
       • Guarding–peritoneal irritation†
       • Point tenderness–localized pathology (appendicitis, cholecystitis)
  3. Asks about maintaining factors–what perpetuates pain
     • “What do you think keeps the pain going?”
     • Ongoing pathology:
       • Untreated infection–appendicitis, cholecystitis, diverticulitis
       • Persistent obstruction–biliary, bowel, ureteral
       • Continued irritant–NSAIDs, alcohol
       • Progressive disease–malignancy, chronic pancreatitis†
     • Behavioral factors:
       • Continued dietary triggers
       • Medication non-compliance
       • Delayed seeking care
  4. Asks about relieving factors–what makes pain better
     • “What makes the pain better?”
     • Position:
       • Fetal position–pancreatitis, peritonitis
       • Leaning forward–pancreatitis (classic), pericarditis
       • Lying still–peritonitis
       • Movement/pacing–colic (renal, biliary)–cannot get comfortable
     • Food/Antacids:
       • Antacids relieve–GERD, peptic ulcer, gastritis
       • Eating relieves–duodenal ulcer
       • Fasting relieves–pancreatitis, biliary colic, mesenteric ischemia
     • Medications:
       • NSAIDs–renal colic
       • Antispasmodics–biliary/bowel colic, IBS
       • Opioids–most causes (but mask pathology)
       • PPIs/H2 blockers–peptic disease, GERD
     • Defecation/Flatulence:
       • Relief with bowel movement–IBS, constipation
       • Relief with passing gas–bloating, early obstruction
     • Vomiting:
       • Relief with vomiting–gastric outlet obstruction, bowel obstruction (proximal)

• 19.4Accompanying Symptoms & Circumstances Heuristic

  1. Asks about accompanying symptoms–associated symptoms for differential diagnosis
     • “What other symptoms do you have with the pain?”
     • Gastrointestinal symptoms:
       • Nausea & vomiting–bilious (green) vomiting suggests obstruction distal to ampulla†; feculent vomiting suggests distal bowel obstruction†
       • Diarrhea–bloody (IBD, ischemic colitis†), watery (gastroenteritis)
       • Constipation–obstipation (no stool or gas) suggests complete obstruction†
       • Rectal bleeding–melena (upper GI), hematochezia (lower GI or massive upper GI bleed)†
       • Bloating/distension–progressive distension suggests obstruction or ascites†
       • Anorexia–appendicitis (classic), any serious abdominal pathology
     • Cardiovascular symptoms:
       • Chest pain–epigastric pain may be inferior MI†
       • Palpitations–atrial fibrillation (risk for mesenteric embolism)†
       • Syncope–GI bleeding with hemodynamic compromise, ruptured AAA, ruptured ectopic†
     • Genitourinary symptoms:
       • Dysuria, urinary frequency–UTI, pelvic pathology irritating bladder
       • Hematuria–renal/ureteral stone, UTI
       • Vaginal discharge/bleeding–ectopic pregnancy†, PID, ovarian pathology
       • Missed period + abdominal pain–ectopic pregnancy until proven otherwise†
       • Testicular pain–referred from ureteral stone, testicular torsion†
     • Systemic symptoms:
       • Fever–high fever with abdominal pain suggests appendicitis, cholangitis, diverticulitis with abscess, peritonitis†
       • Chills/rigors–cholangitis (Charcot’s triad), sepsis†
       • Weight loss–malignancy, chronic pancreatitis, IBD, mesenteric ischemia†
       • Night sweats–malignancy, abscess
       • Fatigue–anemia from GI bleeding, chronic disease
     • Dermatologic signs:
       • Jaundice–biliary obstruction, cholangitis, hepatitis†
       • Cullen’s sign (periumbilical ecchymosis)–retroperitoneal hemorrhage, severe pancreatitis†
       • Grey Turner’s sign (flank ecchymosis)–retroperitoneal hemorrhage, severe pancreatitis†
  2. Asks about life circumstances–social and occupational context
     • “Tell me about your diet, recent travel, and lifestyle.”
     • Diet:
       • Fatty food intake–biliary disease
       • Spicy food intake–gastritis
       • Fiber intake–constipation, diverticular disease
       • Food hygiene, recent dietary changes
     • Travel:
       • Recent travel–infectious diarrhea, parasites
       • Endemic areas–amebiasis, typhoid
     • Occupation:
       • Sedentary work–constipation
       • Heavy lifting–hernia risk
       • Food handling–infectious exposure
     • Stress and living situation:
       • Life stressors–IBS exacerbation, functional pain
       • Recent major life events
       • Food security, cooking facilities
       • Household contacts with similar symptoms–infectious
     • Substance use:
       • Alcohol–quantity, duration (pancreatitis, liver disease, gastritis); recent binge (acute pancreatitis trigger)
       • Tobacco–peptic ulcer, vascular disease
       • Cocaine–mesenteric ischemia (vasoconstriction)†
       • IV drug use–endocarditis with emboli, hepatitis

• 19.5Red Flags & Interconnectedness

  Red Flags–Require immediate or urgent evaluation

  Emergency presentations–Acute surgical abdomen

  • Abdominal pain + rigidity + guarding–peritonitis (perforated viscus, advanced appendicitis)†
  • Severe abdominal pain + hypotension/shock–AAA rupture, mesenteric ischemia, ruptured ectopic, massive GI bleed†
  • Pulsatile abdominal mass + hypotension + severe abdominal/back pain–ruptured AAA†
  • Severe abdominal pain + atrial fibrillation + pain out of proportion to exam–mesenteric ischemia†
  • Abdominal distension + obstipation + bilious vomiting–bowel obstruction†

  High-risk presentations

  • RLQ pain + fever + anorexia + migration from periumbilical–appendicitis†
  • RUQ pain + fever + jaundice (Charcot’s triad)–cholangitis†
  • Epigastric pain radiating to back + vomiting + history of alcohol/gallstones–pancreatitis†
  • Lower abdominal pain + missed period + vaginal bleeding–ectopic pregnancy†
  • Abdominal pain + GI bleeding + hemodynamic instability–massive GI hemorrhage†
  • Sudden severe unilateral lower abdominal pain + nausea/vomiting–ovarian torsion†

  Age-specific red flags

  • Elderly + abdominal pain + cardiovascular disease–higher mortality, consider mesenteric ischemia, AAA, malignancy†
  • Elderly + new onset abdominal pain–atypical presentations more common†

  Interconnectedness

  Not to be missed

  • Mesenteric ischemia: severe pain out of proportion to exam + elderly + atrial fibrillation + cardiovascular disease
  • Ruptured AAA: abdominal/back pain + hypotension + pulsatile mass + elderly male + cardiovascular risk factors
  • Perforated viscus: sudden severe pain becoming diffuse + rigid abdomen + guarding + absent bowel sounds

  Complaint patterns

  • Appendicitis: periumbilical pain → RLQ over 12-24 hours + anorexia + nausea/vomiting + low-grade fever + RLQ tenderness (McBurney’s point)
  • Cholecystitis: RUQ pain + post-prandial (fatty meal) + nausea/vomiting + fever + Murphy’s sign
  • Cholangitis: RUQ pain + fever + jaundice (Charcot’s triad) + may progress to hypotension + altered mental status (Reynolds’ pentad)
  • Pancreatitis: epigastric pain radiating to back + vomiting + better leaning forward + alcohol or gallstone history
  • Bowel obstruction: colicky abdominal pain + vomiting (bilious/feculent) + distension + obstipation + high-pitched → absent bowel sounds
  • Diverticulitis: LLQ pain + fever + change in bowel habits + elderly (“left-sided appendicitis”)
  • Peptic ulcer: epigastric pain + meal-related pattern + duodenal (better with food, nocturnal) vs gastric (worse with food)
  • Biliary colic: RUQ/epigastric pain + fatty meal trigger + radiates to right scapula + episodes lasting 1-4 hours
  • Renal colic: flank pain → groin + writhing patient + hematuria + waves of severe pain
  • Ectopic pregnancy: lower abdominal pain + missed period + vaginal bleeding + risk factors (previous ectopic, PID, IUD)
  • Ovarian torsion: sudden severe unilateral lower abdominal pain + nausea/vomiting + may have known ovarian cyst
  • IBS: chronic recurrent abdominal pain + relief with defecation + altered stool form/frequency + no red flags
  • Mesenteric ischemia (chronic): postprandial pain (“intestinal angina”) + food fear + weight loss + cardiovascular disease

  Specific syndrome patterns

  • Periumbilical pain migrating to RLQ + anorexia + fever–appendicitis†
  • RUQ pain + fever + jaundice–cholangitis (Charcot’s triad)†
  • Epigastric pain to back + vomiting + alcohol/gallstones–pancreatitis†
  • Severe abdominal pain + benign exam + atrial fibrillation–mesenteric ischemia†
  • Back/abdominal pain + hypotension + pulsatile mass–ruptured AAA†
  • Lower abdominal pain + missed period + vaginal bleeding–ectopic pregnancy†
  • Distension + obstipation + bilious vomiting–bowel obstruction†
  • LLQ pain + fever + elderly–diverticulitis
  • RUQ pain + fatty meal + radiates to scapula–biliary colic/cholecystitis
  • Flank pain to groin + writhing + hematuria–renal colic

20--Diarrhea

• 20.1Complaint Heuristic

  1. Asks about the nature of diarrhea
     • “Tell me about your stools. What do they look like?”
     • Stool consistency:
       • Watery–secretory or osmotic diarrhea, viral gastroenteritis, cholera
       • Loose/mushy–most infectious causes, IBS-D
       • Bloody–inflammatory (IBD, infectious colitis, ischemic colitis)†
       • Mucoid–IBD, IBS, infectious dysentery
       • Greasy/fatty (steatorrhea)–malabsorption (celiac, pancreatic insufficiency)
     • Stool appearance:
       • Yellow/pale–malabsorption, rapid transit
       • Green–rapid transit, bile not reabsorbed
       • Black/tarry (melena)–upper GI bleeding†
       • Bright red–lower GI bleeding, hemorrhoids†
       • “Rice water”–cholera (severe secretory)†
       • Floating–fat malabsorption (steatorrhea)
       • Foul-smelling–malabsorption, Giardia, C. difficile
     • Volume patterns:
       • Large volume, watery–small bowel origin (secretory, osmotic)
       • Small volume, frequent–large bowel/rectal origin (inflammatory, IBS)
       • Massive volume–cholera, severe secretory diarrhea†
  2. Asks about the intensity of diarrhea
     • “How severe is the diarrhea? How is it affecting you?”
     • Functional impact:
       • Unable to maintain hydration–emergency†
       • Hemodynamic instability–emergency†
       • Interferes with work/activities–moderate-severe
       • Nocturnal diarrhea–organic cause (IBD, infection), less likely IBS†
     • Associated urgency/incontinence:
       • Severe urgency with incontinence–inflammatory colitis, severe infection
       • Fecal incontinence–severe disease, sphincter dysfunction
     • Frequency:
       • Mild–3-5 stools/day
       • Moderate–6-10 stools/day
       • Severe–>10 stools/day or continuous†
     • Volume per episode:
       • Large volume (>500 mL/episode)–significant fluid loss risk†
       • Small volume with urgency–rectal/distal colonic inflammation
  3. Asks about localization–associated pain location
     • “Where is the cramping or pain when you have diarrhea?”
     • Upper abdominal/periumbilical:
       • Small bowel diarrhea
       • Gastroenteritis
       • Malabsorption
     • Lower abdominal/LLQ:
       • Colonic diarrhea
       • Diverticulitis
       • IBD (left-sided colitis)
     • RLQ:
       • Crohn’s disease (ileitis)
       • Appendicitis with diarrhea
     • Diffuse:
       • Severe gastroenteritis
       • Pancolitis (UC, infectious)
       • C. difficile colitis†
     • Rectal/Perianal:
       • Proctitis
       • Hemorrhoids (with blood)
       • Anal fissure
  4. Asks about associated rectal sensations
     • “Do you feel like you can’t completely empty your bowels?”
     • Tenesmus:
       • Sensation of incomplete evacuation, rectal urgency with little stool passed
       • Suggests proctitis, rectal mass, IBD, infectious proctocolitis
     • Associated pain patterns:
       • Cramping before bowel movement, relieved with defecation–IBS pattern
       • Cramping not relieved with defecation–inflammatory, infectious

• 20.2Time-Intensity Heuristic

  1. Asks about onset–when diarrhea started
     • “When did the diarrhea start? How did it begin?”
     • Classification by duration:
       • Acute diarrhea (<14 days)–most commonly infectious, usually self-limited, main concern is dehydration
       • Persistent diarrhea (14-28 days)–may indicate ongoing infection (parasites), post-infectious IBS
       • Chronic diarrhea (>4 weeks)–requires systematic workup (IBD, IBS, malabsorption, microscopic colitis, malignancy)†
     • Onset patterns:
       • Sudden (hours)–toxin-mediated (food poisoning), viral
       • Over 1-3 days–bacterial infection
       • Gradual (weeks)–IBD, malabsorption, malignancy†
  2. Asks about course over time–how diarrhea has evolved
     • “How has the diarrhea changed since it started?”
     • Improving:
       • Typical for acute infectious diarrhea (3-7 days)
       • Post-infectious–may take 2-4 weeks to fully normalize
     • Worsening:
       • Progressive worsening–consider IBD, C. difficile, malignancy†
       • Worsening despite treatment–resistant organism, wrong diagnosis
     • Stable/Chronic:
       • IBS–chronic, fluctuating
       • IBD–flares and remissions
       • Malabsorption–persistent until treated
     • Intermittent:
       • IBS–diarrhea alternating with normal/constipation
       • IBD–flares and remissions
       • Food intolerance–related to specific exposures
  3. Asks about course during day–diurnal pattern
     • “Is there a pattern to when the diarrhea occurs during the day?”
     • Timing:
       • Morning predominance–IBS common pattern (“morning rush”)
       • Post-prandial–gastrocolic reflex, dumping syndrome, bile acid malabsorption
       • Nocturnal diarrhea–organic cause (IBD, diabetic autonomic neuropathy), NOT typical of IBS†
       • Any time, unpredictable–infectious, inflammatory
     • Relationship to meals:
       • Worse after eating–dumping, bile acid diarrhea, gastrocolic reflex
       • Worse with specific foods–lactose intolerance, celiac, food allergies
       • Fasting improves–osmotic diarrhea, food-related
  4. Asks about frequency–pattern of diarrhea episodes
     • “How many times a day are you having diarrhea?”
     • Episodes per day:
       • Document baseline and current frequency
       • >10 episodes/day–severe, risk of dehydration†
       • Frequency trend–improving, stable, worsening
     • Pattern:
       • Every day–active disease (infection, IBD, malabsorption)
       • Intermittent days–IBS, food-related, mild IBD
       • Cyclical–IBD flares, menstrual-related

• 20.3Triggering & Modifying Factors Heuristic

  1. Asks about triggering factors–what initiated the diarrhea
     • “What do you think triggered the diarrhea?”
     • Infectious exposures:
       • Food–undercooked meat, eggs, seafood, unpasteurized dairy
       • Onset 6-24 hours–bacterial toxin (S. aureus, B. cereus)
       • Onset 24-72 hours–bacterial infection (Salmonella, Campylobacter, E. coli)
       • Water–contaminated water, travel
       • Close contacts–household members, daycare, nursing home with similar symptoms (viral, Shigella)
       • Healthcare exposure–C. difficile (recent hospitalization, antibiotics)†
     • Dietary triggers:
       • Dairy–lactose intolerance
       • Gluten–celiac disease
       • High-fat foods–pancreatic insufficiency, bile acid diarrhea
       • Sugar alcohols (sorbitol, mannitol)–osmotic diarrhea (sugar-free products)
       • Caffeine–stimulates motility
       • Alcohol–GI irritant, osmotic effect
     • Medication triggers:
       • Recent antibiotics–C. difficile colitis (up to 8 weeks after)†
       • Metformin–common cause of diarrhea
       • NSAIDs–GI irritation
       • PPIs–increased infection risk, SIBO
       • Magnesium-containing antacids–osmotic
       • Colchicine, chemotherapy, immunosuppressants
       • Laxative abuse
     • Other triggers:
       • Stress/anxiety–IBS exacerbation
       • Radiation therapy–radiation enteritis/colitis
       • Recent travel–traveler’s diarrhea (E. coli, Campylobacter, Giardia)
       • Recent surgery–especially gallbladder (bile acid diarrhea), bowel resection
  2. Asks about aggravating factors–what makes diarrhea worse
     • “What makes the diarrhea worse?”
     • Dietary:
       • Eating–gastrocolic reflex
       • Specific foods–lactose, gluten, fatty foods
       • Large meals
       • Caffeine, alcohol
     • Other:
       • Stress–IBS
       • Continued antibiotic use
       • Physical activity (sometimes)
  3. Asks about maintaining factors–what perpetuates diarrhea
     • “What do you think keeps the diarrhea going?”
     • Ongoing factors:
       • Continued dietary trigger exposure
       • Untreated infection
       • Active IBD without treatment
       • Ongoing medication causing diarrhea
       • Malabsorption (untreated celiac, pancreatic insufficiency)
  4. Asks about relieving factors–what makes diarrhea better
     • “What makes the diarrhea better?”
     • Dietary modifications:
       • Fasting–osmotic diarrhea improves (secretory does not)
       • Eliminating lactose–lactose intolerance
       • Eliminating gluten–celiac disease
       • BRAT diet–symptomatic relief in acute diarrhea
       • Low-FODMAP diet–IBS
     • Medications:
       • Loperamide (Imodium)–slows motility (avoid in bloody/inflammatory diarrhea)
       • Bismuth subsalicylate (Pepto-Bismol)–antisecretory, antibacterial
       • Cholestyramine–bile acid diarrhea
       • Antibiotics–bacterial infection (when indicated)
     • Other:
       • Bowel rest
       • Stopping offending medication
       • Stress reduction (IBS)

• 20.4Accompanying Symptoms & Circumstances Heuristic

  1. Asks about accompanying symptoms–associated symptoms for differential diagnosis
     • “What other symptoms do you have with the diarrhea?”
     • Gastrointestinal symptoms:
       • Abdominal pain–crampy, relieved with defecation (IBS); crampy, not relieved (infectious, inflammatory); severe pain (C. difficile, ischemic colitis, toxic megacolon)†
       • Nausea & vomiting–viral gastroenteritis (vomiting often precedes diarrhea), food poisoning (prominent vomiting 6-24 hours after ingestion)
       • Blood in stool–invasive infection (Shigella, EHEC, Campylobacter), IBD, ischemic colitis†
       • Mucus in stool–IBD, IBS, infectious
       • Rectal urgency/tenesmus–proctitis, distal colitis
       • Bloating–malabsorption, IBS, SIBO
       • Fecal incontinence–severe urgency, sphincter dysfunction
     • Systemic symptoms:
       • Fever–high fever suggests invasive bacterial infection, C. difficile, IBD flare†; low-grade (viral, early bacterial); absent (toxin-mediated, IBS, malabsorption)
       • Dehydration signs–thirst, dry mouth, decreased urine output, dizziness, skin tenting, sunken eyes, tachycardia, hypotension†
       • Weight loss–significant weight loss suggests malabsorption, IBD, malignancy†; acute weight loss from dehydration (fluid loss)
       • Fatigue–dehydration, anemia, chronic disease
       • Night sweats–IBD, malignancy, infection
     • Extraintestinal manifestations (suggests IBD):
       • Joint pain/swelling (arthritis)
       • Eye redness/pain (uveitis, episcleritis)
       • Skin lesions (erythema nodosum, pyoderma gangrenosum)
       • Mouth ulcers (aphthous ulcers)
     • Neurological:
       • Paresthesias–B12 deficiency (ileal disease, bacterial overgrowth)
  2. Asks about life circumstances–social and occupational context
     • “Tell me about your diet, travel, and recent exposures.”
     • Travel history:
       • Recent travel (within 2-4 weeks)–developing countries (traveler’s diarrhea)
       • Water/food exposures–tap water, ice, raw foods
       • Duration and activities during travel
     • Diet:
       • Detailed dietary history–recent changes
       • Food sources–restaurant, home-prepared
       • Specific food exposures before onset
     • Occupation:
       • Food handler–public health implications, work restrictions
       • Healthcare worker–exposure risk, work restrictions
       • Daycare worker–exposure risk, transmission risk
     • Living situation:
       • Household contacts with similar symptoms–suggests infectious etiology
       • Institutional living–nursing home, prison (outbreak potential)
       • Sanitation/water quality
     • Substance use:
       • Alcohol–GI irritant, chronic liver disease
       • Caffeine–stimulates motility
       • Laxative abuse–factitious diarrhea
     • Stress/Psychosocial:
       • Life stressors–IBS exacerbation
       • Anxiety, depression

• 20.5Red Flags & Interconnectedness

  Red Flags–Require immediate or urgent evaluation

  Emergency presentations

  • Diarrhea + severe dehydration (hypotension, tachycardia, oliguria)–emergency rehydration required†
  • Bloody diarrhea + fever + severe abdominal pain–invasive bacterial infection, IBD, ischemic colitis†
  • Diarrhea + recent antibiotics + fever + severe abdominal pain–C. difficile colitis†
  • Profuse watery diarrhea + severe dehydration + travel to endemic area–cholera or severe traveler’s diarrhea†
  • Hemodynamic instability (hypotension, shock) with diarrhea†

  High-risk presentations

  • Chronic diarrhea + weight loss + bloody stool–IBD or colorectal malignancy†
  • Diarrhea + abdominal pain in elderly/vascular disease patient–ischemic colitis†
  • Diarrhea + extraintestinal manifestations (arthritis, eye inflammation, skin lesions)–IBD†
  • Nocturnal diarrhea–organic cause (IBD, infection), not typical of IBS†
  • Bloody diarrhea in child–avoid antimotility agents if EHEC suspected (HUS risk)†

  When to order stool studies

  • Bloody diarrhea
  • Fever >38.5°C
  • Severe abdominal pain
  • Duration >7 days
  • Recent antibiotics (C. difficile)
  • Recent travel
  • Immunocompromised patient
  • Outbreak setting

  Interconnectedness

  Not to be missed

  • C. difficile colitis: diarrhea + recent antibiotics (within 8 weeks) + fever + severe abdominal pain + healthcare exposure
  • Ischemic colitis: bloody diarrhea + abdominal pain + elderly + cardiovascular disease/atrial fibrillation
  • EHEC (E. coli O157:H7): bloody diarrhea + no fever initially + HUS risk (especially children)–avoid antibiotics and antimotility agents

  Complaint patterns

  • Viral gastroenteritis: acute watery diarrhea + vomiting + low-grade fever + close contacts ill + self-limited (24-72 hours)
  • Bacterial enteritis: acute diarrhea + fever + may be bloody + abdominal cramping + 24-72 hour incubation
  • Food poisoning (toxin-mediated): vomiting + diarrhea + onset 6-24 hours after meal + self-limited
  • C. difficile colitis: watery diarrhea + recent antibiotics + crampy pain + fever + pseudomembranous colitis
  • Traveler’s diarrhea: acute watery diarrhea + recent travel to developing country + may progress to bloody
  • Ulcerative colitis: bloody diarrhea + mucus + urgency + tenesmus + continuous inflammation from rectum + extraintestinal manifestations
  • Crohn’s disease: diarrhea (may or may not be bloody) + RLQ pain (terminal ileum) + weight loss + perianal disease + fistulas
  • Celiac disease: chronic diarrhea + steatorrhea + bloating + weight loss + iron deficiency anemia + dermatitis herpetiformis
  • Pancreatic insufficiency: steatorrhea (fatty, foul-smelling, floating stools) + weight loss + history of chronic pancreatitis or cystic fibrosis
  • Bile acid diarrhea: watery diarrhea + worse after fatty meals + post-cholecystectomy or ileal disease + responds to cholestyramine
  • IBS-D: chronic diarrhea + alternating constipation + morning predominance + relieved with defecation + no red flags + no nocturnal symptoms
  • Giardiasis: chronic watery diarrhea + bloating + flatulence + foul-smelling stool + travel/camping history

  Specific syndrome patterns

  • Watery diarrhea + vomiting + close contacts ill–viral gastroenteritis
  • Bloody diarrhea + fever + recent undercooked food–bacterial enteritis (Salmonella, Campylobacter, Shigella)†
  • Diarrhea + recent antibiotics + fever–C. difficile colitis†
  • Bloody diarrhea + elderly + cardiovascular disease–ischemic colitis†
  • Chronic diarrhea + weight loss + bloody stool–IBD or malignancy†
  • Chronic diarrhea + bloating + fatty stools + weight loss–malabsorption (celiac, pancreatic insufficiency)
  • Chronic diarrhea + morning predominance + relieved with defecation + no nocturnal symptoms–IBS
  • Diarrhea + post-cholecystectomy + fatty meal intolerance–bile acid diarrhea
  • Diarrhea + arthritis + eye inflammation + skin lesions–IBD with extraintestinal manifestations†

21--Constipation

• 21.1Complaint Heuristic

  1. Asks about the nature of constipation
     • “Tell me about your bowel movements. What are the stools like?”
     • Stool characteristics (Bristol Stool Scale):
       • Hard, pellet-like (Type 1)–severe constipation, slow transit
       • Lumpy, sausage-shaped (Type 2)–moderate constipation
       • Sausage with cracks (Type 3)–normal range
       • Smooth, soft sausage (Type 4)–ideal
     • Associated features:
       • Straining–effort required to evacuate
       • Hard stools–difficult to pass
       • Incomplete evacuation–sensation of residual stool
       • Anorectal blockage–sensation of obstruction
       • Manual maneuvers–digital disimpaction, perineal pressure, vaginal splinting
     • Stool caliber:
       • Pencil-thin stools–suggests rectal/sigmoid mass, stricture†
       • Normal caliber but hard–functional, slow transit
       • Variable caliber–IBS, functional
  2. Asks about the intensity of constipation
     • “How severe is the constipation? How is it affecting your daily life?”
     • Functional impact:
       • Minimal–occasional inconvenience
       • Moderate–affects daily activities, requires regular medication
       • Severe–significantly impairs quality of life, hospitalization required
     • Associated symptoms:
       • Degree of straining
       • Pain with defecation
       • Bloating severity
       • Nausea/vomiting
     • Frequency:
       • Mild–bowel movement every 3-4 days
       • Moderate–bowel movement every 5-7 days
       • Severe–bowel movement <1 per week or requiring manual intervention
  3. Asks about localization–associated pain location
     • “Where do you feel discomfort with the constipation?”
     • Abdominal location:
       • Left lower quadrant–sigmoid colon distension, diverticular disease
       • Diffuse–generalized colonic distension, ileus
       • Suprapubic–rectal fullness
       • Right lower quadrant–cecal distension (late obstruction)†
     • Rectal/Perianal:
       • Rectal pain–anal fissure, hemorrhoids, rectal mass
       • Perineal discomfort–pelvic floor dysfunction, rectocele
  4. Asks about associated patterns
     • “How does the bloating and discomfort change?”
     • Associated bloating patterns:
       • Progressive throughout day
       • Relieved after bowel movement
       • Persistent despite bowel movement–obstruction, pseudo-obstruction†
     • Associated pain patterns:
       • Crampy pain relieved by bowel movement–functional, mild obstruction
       • Constant pain not relieved–complete obstruction, peritonitis†

• 21.2Time-Intensity Heuristic

  1. Asks about onset–when constipation started
     • “When did the constipation start? Was it sudden or gradual?”
     • Acute onset (days to weeks):
       • Sudden onset in previously regular patient–obstruction, new medication, acute illness†
       • Post-surgical–opioids, ileus, anesthesia effects
       • Hospitalization–immobility, medications, dietary changes
       • Travel–dietary changes, dehydration, altered routine
     • Gradual onset (months):
       • Functional constipation developing over time
       • Slow-growing tumor†
       • Medication accumulation effect
       • Lifestyle changes
     • Chronic/Lifelong:
       • Chronic idiopathic constipation
       • IBS-C (constipation-predominant)
       • Pelvic floor dysfunction
       • Congenital (Hirschsprung’s–usually presents in childhood)
  2. Asks about course over time–how constipation has evolved
     • “How has the constipation changed since it started?”
     • Worsening:
       • Progressively worsening–concerning for malignancy, progressive stricture†
       • Stepwise worsening–new medication additions
       • Acute worsening–obstruction, fecal impaction†
     • Stable:
       • Chronic functional constipation
       • Well-managed with medications
     • Fluctuating:
       • IBS (alternating constipation/diarrhea)
       • Dietary variation
       • Medication compliance variation
  3. Asks about course during day–diurnal pattern
     • “Is there a pattern to when you feel the urge to go?”
     • Timing:
       • Morning urge absent–common in functional constipation (suppressed gastrocolic reflex)
       • Urge present but difficult evacuation–dyssynergic defecation, pelvic floor dysfunction
       • No urge at all–slow transit, severe constipation, neuropathy
     • Relationship to meals:
       • Normal gastrocolic reflex–urge after meals (especially breakfast)
       • Absent gastrocolic reflex–severe constipation, neuropathy
  4. Asks about frequency–bowel movement frequency
     • “How often are you having bowel movements?”
     • Baseline vs. current:
       • Document baseline bowel habits
       • Quantify change from baseline
       • Duration of change
     • Typical patterns:
       • Normal range–3 per day to 3 per week
       • <3 per week–meets constipation criteria
       • Frequency with quality–may be frequent but incomplete (dyssynergia)

• 21.3Triggering & Modifying Factors Heuristic

  1. Asks about triggering factors–what initiated the constipation
     • “What do you think caused the constipation?”
     • Medications (most common secondary cause):
       • Opioids–most common medication cause
       • Anticholinergics–antihistamines, tricyclic antidepressants, antipsychotics
       • Calcium channel blockers–verapamil > others
       • Iron supplements, calcium supplements
       • Aluminum-containing antacids
       • Anticonvulsants, anti-Parkinson medications
       • Diuretics–dehydration effect
     • Dietary factors:
       • Low fiber diet
       • Inadequate fluid intake
       • Change in diet (travel, illness)
       • Excessive dairy (in some)
     • Lifestyle factors:
       • Immobility/sedentary lifestyle
       • Ignoring urge to defecate (suppresses reflex)
       • Travel (routine disruption)
       • Recent surgery
     • Psychological:
       • Depression, anxiety, stress
       • Eating disorders
  2. Asks about aggravating factors–what makes constipation worse
     • “What makes the constipation worse?”
     • Dietary:
       • Low fiber intake
       • Dehydration
       • Excess processed foods
       • Excessive iron/calcium supplementation
     • Lifestyle:
       • Continued immobility
       • Ignoring defecation urge
       • Travel
     • Medical:
       • Adding constipating medications, opioid dose increase
       • Progressive disease (hypothyroidism, diabetes)
       • Worsening neurological condition
       • Tumor growth†
  3. Asks about maintaining factors–what perpetuates constipation
     • “What do you think keeps the constipation going?”
     • Ongoing factors:
       • Continued constipating medications
       • Persistent low fiber/fluid intake
       • Sedentary lifestyle
       • Untreated underlying condition
       • Chronic ignoring of defecation urge
     • Vicious cycle:
       • Constipation → painful defecation → avoidance → worsening constipation
  4. Asks about relieving factors–what makes constipation better
     • “What makes the constipation better?”
     • Dietary modifications:
       • Increased fiber (goal: 25-35 g/day)
       • Increased fluid intake (goal: 6-8 glasses/day)
       • Prunes, prune juice (contain sorbitol)
       • Hot beverages (stimulate gastrocolic reflex)
     • Medications/Supplements:
       • Bulk-forming–psyllium (Metamucil), methylcellulose
       • Osmotic–PEG (MiraLAX), lactulose, magnesium citrate
       • Stimulant–senna, bisacodyl (short-term)
       • Prescription–lubiprostone, linaclotide, plecanatide, prucalopride
     • Lifestyle:
       • Regular physical activity
       • Establishing regular defecation routine
       • Not ignoring urge
       • Proper toilet positioning (squatting position, footstool)
     • Manual interventions:
       • Digital disimpaction (severe cases)
       • Enemas (acute relief)
       • Biofeedback (pelvic floor dysfunction)

• 21.4Accompanying Symptoms & Circumstances Heuristic

  1. Asks about accompanying symptoms–associated symptoms for differential diagnosis
     • “What other symptoms do you have with the constipation?”
     • Gastrointestinal symptoms:
       • Abdominal pain–crampy, relieved by bowel movement (functional); severe, constant pain (obstruction, perforation)†; LLQ pain (sigmoid distension, diverticular disease)
       • Bloating/distension–common in constipation; progressive distension (obstruction)†; relieved after bowel movement (functional)
       • Nausea & vomiting–feculent vomiting (complete bowel obstruction)†; nausea with severe constipation (fecal impaction)
       • Rectal bleeding–bright red on paper/surface (hemorrhoids, fissure from straining); blood mixed with stool (colonic pathology, malignancy)†
       • Diarrhea alternating–IBS-M (mixed); overflow diarrhea around impaction†; partial obstruction
       • Fecal incontinence–overflow incontinence from impaction†
     • Anorectal symptoms:
       • Pain with defecation–anal fissure, hemorrhoids
       • Bleeding with defecation–hemorrhoids, fissure
       • Prolapse–rectal prolapse, hemorrhoids
       • Incomplete evacuation–pelvic floor dysfunction, rectocele
       • Manual maneuvers needed–severe dysfunction
     • Systemic symptoms:
       • Weight loss–unintentional weight loss suggests malignancy, thyroid disease†; weight loss + constipation + elderly is high concern for malignancy
       • Fatigue–hypothyroidism, malignancy, chronic illness
       • Fever–obstruction with perforation, diverticulitis†
       • Night sweats–malignancy
     • Neurological symptoms:
       • Weakness, paresthesias–neuropathy (diabetes, Parkinson’s)
       • Cognitive changes–hypothyroidism, severe electrolyte disturbance
     • Urinary symptoms:
       • Urinary retention–severe constipation/impaction pressing on bladder
       • Incomplete bladder emptying–pelvic floor dysfunction
  2. Asks about life circumstances–social and lifestyle context
     • “Tell me about your diet, activity level, and daily routine.”
     • Diet:
       • Fiber intake (fruits, vegetables, whole grains)
       • Fluid intake (type and quantity)
       • Processed food consumption
       • Recent dietary changes
     • Lifestyle:
       • Physical activity level
       • Occupation (sedentary vs. active)
       • Access to bathroom at work
       • Toilet habits (ignoring urge, rushing)
     • Living situation:
       • Access to bathroom, privacy for defecation
       • Ability to prepare high-fiber foods
       • Caregiver support if needed
     • Psychological:
       • Depression, anxiety, stress levels
       • Body image concerns (eating disorders)
     • Travel:
       • Recent travel, frequent travel (routine disruption)

• 21.5Red Flags & Interconnectedness

  Red Flags–Require immediate or urgent evaluation (ALARM symptoms)

  Emergency presentations

  • Acute constipation + abdominal distension + vomiting + no flatus–bowel obstruction†
  • Constipation + severe abdominal pain + fever–obstruction with perforation, diverticulitis†
  • Feculent vomiting–complete bowel obstruction†

  High-risk presentations

  • New-onset constipation in patient >50 years + weight loss–colorectal malignancy until proven otherwise†
  • Constipation + rectal bleeding (blood mixed with stool)–colorectal malignancy, IBD†
  • Constipation + iron deficiency anemia–colorectal malignancy (occult blood loss)†
  • Progressive narrowing of stool caliber (pencil-thin)–rectal/sigmoid mass†
  • Family history of colorectal cancer + new constipation–increased malignancy risk†
  • Constipation + new neurological symptoms–spinal cord lesion, neurological disease†
  • Sudden onset in previously regular patient–obstruction, new medication, acute illness†

  Colonoscopy indications

  • Age ≥50 (or ≥45 in high-risk) without recent colonoscopy
  • Alarm symptoms (weight loss, bleeding, anemia, family history)
  • New-onset constipation in older patient
  • Change in bowel habits
  • Positive fecal occult blood test
  • Failed empiric therapy

  Interconnectedness

  Not to be missed

  • Colorectal malignancy: new-onset constipation + age >50 + weight loss + change in stool caliber + rectal bleeding
  • Bowel obstruction: acute constipation + distension + vomiting + obstipation (no stool or gas)
  • Hypothyroidism: constipation + fatigue + cold intolerance + weight gain + dry skin

  Complaint patterns

  • Chronic idiopathic constipation: infrequent bowel movements (<3/week) + hard stools + straining + no structural cause + response to fiber/fluids/lifestyle
  • IBS-C (constipation-predominant): recurrent abdominal pain + associated with defecation + change in stool frequency/form + Rome IV criteria
  • Pelvic floor dysfunction (dyssynergic defecation): difficulty evacuating despite urge + sensation of blockage + need for manual maneuvers + paradoxical pelvic floor contraction
  • Slow transit constipation: infrequent bowel movements + reduced urge + poor response to fiber (may worsen bloating) + delayed colonic transit
  • Opioid-induced constipation: constipation + opioid use + specific treatment with PAMORA (methylnaltrexone, naloxegol)
  • Hypothyroidism: constipation + fatigue + cold intolerance + weight gain + bradycardia + dry skin
  • Parkinson’s disease: constipation + tremor + rigidity + bradykinesia (GI symptoms often precede motor symptoms)
  • Medication-induced: constipation + opioids, anticholinergics, calcium channel blockers, iron, calcium supplements

  Specific syndrome patterns

  • New-onset constipation + age >50 + weight loss–colorectal malignancy†
  • Constipation + rectal bleeding mixed with stool–colorectal malignancy†
  • Acute constipation + distension + vomiting + no flatus–bowel obstruction†
  • Constipation + pencil-thin stools–rectal/sigmoid mass†
  • Constipation + fatigue + cold intolerance + weight gain–hypothyroidism
  • Constipation + tremor + rigidity–Parkinson’s disease
  • Chronic constipation + incomplete evacuation + manual maneuvers–pelvic floor dysfunction
  • Alternating constipation/diarrhea + abdominal pain relieved by defecation–IBS-M
  • Constipation + opioid use–opioid-induced constipation

22--Rectal Bleeding

• 22.1Complaint Heuristic

  1. Asks about the nature of bleeding
     • “Tell me about the bleeding. What does the blood look like?”
     • Bright red blood (hematochezia):
       • On toilet paper only–hemorrhoids, anal fissure (most common)
       • Dripping into bowl–hemorrhoids, rectal bleeding
       • On surface of stool–hemorrhoids, fissure, distal polyp/cancer
       • Mixed with stool–colonic source (polyp, cancer, IBD, diverticular)†
       • Large volume bright red–severe lower GI bleed (diverticular, angiodysplasia)†
     • Dark red/Maroon blood:
       • More proximal colonic source
       • May indicate brisk upper GI bleed†
       • Right-sided colonic lesion
     • Black, tarry stool (melena):
       • Upper GI bleeding (stomach, duodenum)–blood digested by stomach acid†
       • Characteristic foul smell, sticky, tar-like consistency
       • Requires ~50-100 mL blood for melena
     • Other characteristics:
       • Blood clots–suggests active, brisk bleeding; larger clots = more significant
       • Mixed with mucus–IBD, infectious colitis, rectal polyp/cancer
  2. Asks about the intensity of bleeding
     • “How much bleeding have you had? How is it affecting you?”
     • Signs of significant blood loss:
       • Lightheadedness, dizziness, syncope or near-syncope†
       • Tachycardia, hypotension†
       • Pallor, fatigue, weakness†
     • Frequency of bleeding:
       • Every bowel movement
       • Intermittent (some movements, not others)
       • Single episode
       • Continuous (regardless of bowel movement)–concerning†
     • Volume assessment:
       • Trace–spotting on paper only
       • Mild–streaks on stool, occasional drops in bowl
       • Moderate–coating stool, pooling in bowl
       • Severe–large volume, clots, continuous bleeding†
  3. Asks about localization–source location clues
     • “Where do you think the bleeding is coming from?”
     • Anorectal source (hemorrhoids, fissure):
       • Blood on paper, dripping, surface of stool
       • Not mixed with stool
       • Pain with defecation (fissure), no pain (internal hemorrhoids)
     • Distal colon/rectum (cancer, polyp, proctitis):
       • Blood mixed with stool or coating
       • May have mucus
       • Change in bowel habits
     • Proximal colon (right-sided cancer, angiodysplasia):
       • Darker blood, maroon
       • More likely occult (iron deficiency anemia)†
       • May be mixed throughout stool
     • Upper GI (stomach, duodenum):
       • Melena (black, tarry)†
       • Massive upper GI bleed can present as bright red if rapid†
  4. Asks about associated pain patterns
     • “Do you have pain with the bleeding?”
     • Pain patterns:
       • Sharp pain with defecation + bleeding–anal fissure
       • Dull perianal discomfort–external hemorrhoids, thrombosed hemorrhoid
       • No pain with bleeding–internal hemorrhoids, angiodysplasia
       • Crampy abdominal pain + bleeding–IBD, ischemic colitis, infectious colitis†
       • Constant abdominal pain + bleeding–ischemic colitis, advanced cancer†

• 22.2Time-Intensity Heuristic

  1. Asks about onset–when bleeding started
     • “When did the bleeding start?”
     • Acute onset (single episode or recent):
       • Hemorrhoid bleed
       • Anal fissure (often with hard stool)
       • Acute diverticular bleed–sudden, painless, large volume†
       • Post-procedural (colonoscopy, polypectomy)
       • Trauma
     • Intermittent/Recurrent:
       • Hemorrhoids (most common)
       • Anal fissure
       • IBD flares
       • Colorectal polyp/cancer (intermittent)
     • Chronic/Progressive:
       • Colorectal cancer (progressive)†
       • IBD (chronic active)
       • Radiation proctitis
  2. Asks about course over time–how bleeding has evolved
     • “How has the bleeding changed since it started?”
     • Improving:
       • Resolving fissure
       • Hemorrhoid bleed stopping
       • Treatment response (IBD)
     • Worsening:
       • Progressive increase–concerning for malignancy†
       • Worsening IBD flare
       • Ongoing diverticular bleed
     • Stable/Intermittent:
       • Chronic hemorrhoids
       • Chronic fissure
       • IBD in partial remission
     • Episode-based:
       • Diverticular bleed (episodic, self-limited)
       • Hemorrhoid flares
  3. Asks about course during day–timing patterns
     • “Is there a pattern to when the bleeding occurs?”
     • Relationship to defecation:
       • During/immediately after–hemorrhoids, fissure, rectal pathology
       • Independent of defecation–more concerning (active colonic bleed)†
     • Relationship to activities:
       • Straining worsens hemorrhoid/fissure bleeding
       • Heavy lifting, prolonged sitting may exacerbate
  4. Asks about frequency–pattern of bleeding
     • “How often does the bleeding occur?”
     • Pattern:
       • Every bowel movement–hemorrhoids, active fissure
       • Occasional–intermittent hemorrhoid, polyp
       • Single episode–may be significant (diverticular, cancer)†
       • Continuous–requires urgent evaluation†
     • Duration:
       • Days–acute cause likely
       • Weeks–requires evaluation
       • Months–chronic source, must rule out malignancy†

• 22.3Triggering & Modifying Factors Heuristic

  1. Asks about triggering factors–what initiated the bleeding
     • “What do you think triggered the bleeding?”
     • Mechanical/Trauma:
       • Straining at stool–hemorrhoids, fissure
       • Hard stools–fissure, hemorrhoid trauma
       • Diarrhea–IBD flare, infectious colitis, irritation
       • Anal intercourse–trauma, STI-related proctitis
       • Recent procedures–colonoscopy, polypectomy, biopsy
     • Dietary:
       • Spicy foods (may worsen hemorrhoids)
       • Low fiber diet (hard stools)
       • Alcohol (portal hypertension bleeding, irritation)
     • Medications:
       • Anticoagulants–warfarin, DOACs (unmask underlying lesion)
       • Antiplatelet agents–aspirin, clopidogrel
       • NSAIDs–can cause/worsen bleeding
  2. Asks about aggravating factors–what makes bleeding worse
     • “What makes the bleeding worse?”
     • Straining/Constipation:
       • Worsens hemorrhoids
       • Reopens fissures
       • Increases intra-abdominal pressure
     • Other factors:
       • Continued anticoagulation–may worsen any bleeding source
       • Heavy lifting (hemorrhoids)
       • Prolonged sitting
  3. Asks about maintaining factors–what perpetuates bleeding
     • “What do you think keeps the bleeding going?”
     • Ongoing factors:
       • Chronic constipation (continued trauma)
       • Untreated IBD
       • Persistent lesion (polyp, cancer)†
       • Continued anticoagulation
       • Portal hypertension (rectal varices)
  4. Asks about relieving factors–what makes bleeding better
     • “What makes the bleeding better?”
     • Conservative measures:
       • Treating constipation (fiber, fluids)
       • Sitz baths
       • Topical treatments (hemorrhoid creams)
       • Stool softeners
     • Medical treatment:
       • IBD medications
       • Hemorrhoid banding/procedures
       • Holding anticoagulation (when safe)
     • Resolution:
       • Fissure healing
       • Hemorrhoid thrombosis resolution
       • Successful treatment of underlying cause

• 22.4Accompanying Symptoms & Circumstances Heuristic

  1. Asks about accompanying symptoms–associated symptoms for differential diagnosis
     • “What other symptoms do you have with the bleeding?”
     • Gastrointestinal symptoms:
       • Abdominal pain–crampy pain + bloody diarrhea (IBD, ischemic colitis, infectious colitis)†; severe abdominal pain (ischemic colitis, perforation)†; LLQ pain + bleeding (diverticular disease); no abdominal pain (hemorrhoids, angiodysplasia)
       • Diarrhea–bloody diarrhea (IBD, infectious colitis, ischemic colitis)†; mucus with blood (IBD, cancer, infectious)
       • Constipation–straining → hemorrhoid/fissure bleeding; new constipation + bleeding (obstructing lesion)†
       • Change in bowel habits–new change in caliber, frequency, consistency (malignancy red flag)†
       • Anal/rectal pain–with defecation (fissure); constant (thrombosed hemorrhoid, abscess, cancer)
       • Tenesmus–rectal mass, proctitis
       • Mucus–IBD, cancer, IBS
     • Systemic symptoms:
       • Weight loss–unintentional weight loss + bleeding (malignancy until proven otherwise)†
       • Fatigue–iron deficiency anemia from chronic blood loss; significant blood loss†
       • Fever–infectious colitis, IBD flare, perforation/abscess†
       • Night sweats–malignancy, IBD
       • Anorexia–malignancy, IBD
     • Cardiovascular symptoms (signs of significant blood loss):
       • Syncope/presyncope–significant blood loss, hemodynamic compromise†
       • Palpitations, tachycardia–blood loss, anemia†
       • Chest pain–demand ischemia from severe anemia†
       • Lightheadedness, dizziness, pallor, hypotension, altered mental status†
  2. Asks about life circumstances–social and lifestyle context
     • “Tell me about your diet, lifestyle, and any risk factors.”
     • Diet:
       • Fiber intake (low fiber → constipation → hemorrhoids/fissure)
       • Fluid intake
       • Spicy foods
     • Lifestyle:
       • Prolonged sitting (hemorrhoid risk)
       • Heavy lifting (hemorrhoid risk)
       • Sedentary lifestyle
     • Occupation:
       • Sedentary work
       • Heavy manual labor
     • Substance use:
       • Alcohol–liver disease, portal hypertension, varices
       • Tobacco–vascular disease, cancer risk
     • Stress:
       • Can exacerbate IBD
       • May affect bowel habits

• 22.5Red Flags & Interconnectedness

  Red Flags–Require immediate or urgent evaluation

  Emergency presentations

  • Rectal bleeding + hemodynamic instability (hypotension, tachycardia, syncope)–severe GI hemorrhage†
  • Large volume bright red blood per rectum + older patient–diverticular bleed, angiodysplasia, or brisk upper GI bleed†
  • Melena (black tarry stool)–upper GI bleeding†
  • Bloody diarrhea + fever + severe abdominal pain–severe infectious colitis, IBD flare, ischemic colitis†

  High-risk presentations

  • Rectal bleeding + unintentional weight loss–colorectal malignancy until proven otherwise†
  • Rectal bleeding + iron deficiency anemia–colorectal malignancy†
  • Rectal bleeding + change in bowel habits in patient >45-50–colorectal malignancy†
  • Rectal bleeding + family history of colorectal cancer–increased malignancy risk†
  • Rectal bleeding + abdominal mass–colorectal malignancy†
  • Blood mixed with stool + change in bowel habits–colonic malignancy†

  Colonoscopy indications

  • Age ≥45-50 with any rectal bleeding
  • Any age with alarm symptoms (weight loss, change in bowel habits, anemia)
  • Family history of colorectal cancer
  • Blood mixed with stool
  • Rectal bleeding not responding to treatment
  • Occult blood positive + anemia

  Interconnectedness

  Not to be missed

  • Colorectal cancer: blood mixed with stool + change in bowel habits + weight loss + age >45-50 + family history
  • Massive upper GI bleed: bright red blood per rectum + hemodynamic instability + elevated BUN/Cr ratio
  • Ischemic colitis: rectal bleeding + elderly + cardiovascular disease + sudden crampy abdominal pain followed by bloody diarrhea

  Complaint patterns

  • Hemorrhoids (internal): bright red blood dripping/on surface of stool + no pain + straining + prolonged sitting or constipation
  • Anal fissure: bright red blood on paper + sharp pain with defecation + constipation history + usually posterior midline
  • Colorectal cancer/polyps: blood mixed with stool + change in bowel habits + weight loss + age >45-50 + may have anemia
  • Diverticular bleeding: sudden, painless, large volume bright red blood + older patient + known diverticulosis + usually self-limited
  • Ulcerative colitis: bloody diarrhea + urgency + tenesmus + crampy abdominal pain + may have extraintestinal manifestations
  • Crohn’s disease: diarrhea (may be bloody) + RLQ pain + weight loss + perianal disease + fistulas
  • Ischemic colitis: elderly + cardiovascular disease + sudden crampy abdominal pain followed by bloody diarrhea + “watershed” areas
  • Angiodysplasia: elderly + painless bleeding + may be occult + right colon + associated with aortic stenosis (Heyde syndrome), CKD
  • Infectious colitis: bloody diarrhea + fever + abdominal pain + travel, food exposure, or recent antibiotics (C. difficile)
  • Radiation proctitis: rectal bleeding + history of pelvic radiation

  Specific syndrome patterns

  • Bright red blood on paper + pain with defecation + constipation–anal fissure
  • Bright red blood dripping + no pain + straining–internal hemorrhoids
  • Blood mixed with stool + weight loss + change in bowel habits–colorectal cancer†
  • Bloody diarrhea + crampy pain + young–IBD (UC, Crohn’s)†
  • Bloody diarrhea + fever + recent travel or antibiotics–infectious colitis†
  • Sudden large volume bright red blood + elderly + painless–diverticular bleed†
  • Rectal bleeding + elderly + cardiovascular disease + abdominal pain–ischemic colitis†
  • Melena (black tarry stool)–upper GI bleeding†
  • Rectal bleeding + hemodynamic instability–severe GI hemorrhage†