Cardiovascular

Orthostatic hypotension in elderly: evaluation and management

Clinical Overview and When to Suspect Orthostatic Hypotension

— Initial OH (0–15 sec): transient, common in young, often missed unless beat-to-beat monitoring used

— Classic OH (within 3 min): most board-relevant, neurogenic or volume-related

— Delayed OH (>3 min, up to 10 min): early autonomic failure, often precedes Parkinson disease or MSA

— Lightheadedness, "graying out," or syncope on standing, especially after meals (postprandial), prolonged recumbency, hot showers, or exertion

— Unexplained falls in elderly — OH is often silent or atypically presents as fatigue, neck/shoulder "coat-hanger" pain, or visual blurring

— New antihypertensive, diuretic, alpha-blocker, TCA, or antiparkinsonian therapy

— Volume loss states: GI bleeding, vomiting, diarrhea, poor PO intake, diuresis

Board pearl: In elderly fallers, always check orthostatics — OH is the single most actionable cause and is missed when only seated BPs are documented. Up to 70% of elderly with OH are asymptomatic, so absence of dizziness does NOT rule it out.

Definition: Sustained drop in systolic BP ≥20 mmHg or diastolic BP ≥10 mmHg within 3 minutes of standing (or head-up tilt). In supine hypertensive elderly, a SBP drop ≥30 mmHg is more specific.

Subtypes by timing:

Why it matters in elderly: Affects 20–30% of community-dwelling adults >65 and up to 50% of nursing home residents. Independent risk factor for falls, fractures, syncope, MI, stroke, cognitive decline, and all-cause mortality.

When to suspect:

Mechanism review: Normally, standing shifts 500–1000 mL blood to lower extremities → baroreceptor-mediated sympathetic surge raises HR 10–20 bpm and vasoconstricts. Failure of this reflex (neurogenic) or inadequate preload (non-neurogenic) → OH.

Presentation Patterns and Key History

— Lightheadedness, dizziness, presyncope, syncope

— Visual blurring or tunneling, "graying out"

— Generalized weakness, fatigue

— Coat-hanger pain — suboccipital/shoulder ache from ischemia of postural muscles, highly suggestive of neurogenic OH

— Cognitive slowing, "brain fog" on standing

— Unexplained falls without prodrome

— Fatigue or confusion only

— Angina or TIA-like symptoms from hypoperfusion

— Morning worst: overnight nocturnal diuresis depletes volume

— Postprandial (within 15–90 min, esp. after carbohydrate-rich meals): splanchnic pooling, exaggerated in diabetics and Parkinson disease

— Post-exercise, hot environment, alcohol: vasodilation

— After prolonged bed rest or hospitalization: deconditioning

— Antihypertensives, especially alpha-blockers (tamsulosin, doxazosin), diuretics, nitrates

— Tricyclics, trazodone, antipsychotics (especially clozapine, quetiapine)

— Levodopa, dopamine agonists, MAO inhibitors

— PDE5 inhibitors, opioids, cannabis

— Erectile dysfunction, urinary retention/incontinence, anhidrosis, constipation, early satiety (gastroparesis)

— REM sleep behavior disorder, anosmia, parkinsonism → think MSA or Parkinson disease

— Length-dependent neuropathy → diabetes, amyloidosis, paraneoplastic

Step 3 management: First clinic visit for falls in elderly — always reconcile the med list and ask about morning vs postprandial timing; this single conversation drives 70% of management decisions before any testing.

Classic symptoms on standing:

Atypical presentations in elderly:

Trigger/timing history (critical):

Medication review — must ask explicitly:

Red flags for underlying autonomic failure:

Volume history: Recent GI losses, poor PO, NPO status, dialysis day, new diuretic dose.

Physical Exam Findings and Hemodynamic Assessment

— Patient supine for ≥5 minutes, measure BP and HR

— Stand patient up, measure BP/HR at 1 minute and 3 minutes (some protocols also 5 and 10 min for delayed OH)

— Positive: SBP drop ≥20 or DBP drop ≥10 within 3 min

— Sitting orthostatics are inadequate — must stand

— HR rise <15 bpm despite significant BP drop → neurogenic OH (autonomic failure)

— HR rise ≥15–20 bpm → non-neurogenic (volume depletion, deconditioning, drugs)

— HR rise >30 bpm or to >120 bpm without BP drop → POTS (younger patients)

— Mucous membranes, skin turgor, JVP — volume status

— Neurologic exam: parkinsonism (bradykinesia, rigidity, cerebellar signs for MSA), peripheral neuropathy (vibration, monofilament), pupillary response

— Anhidrosis check, abnormal sweating distribution

— Cardiac exam: murmurs (AS can mimic), arrhythmia

— Rectal exam if GI bleed suspected

— Valsalva — abnormal phase II/IV responses suggest autonomic failure (formal testing needed)

— Postprandial OH: re-check BP 30–60 min after a meal in clinic if suspected

Key distinction: OH with blunted HR response = neurogenic; OH with robust HR response = volume/drug-mediated. This single bedside finding directs the entire workup — autonomic vs hydration/medication review.

Bedside orthostatic vital signs (the gold standard outpatient test):

Heart rate response — key to subtyping:

Supine hypertension: Present in ~50% of patients with neurogenic OH — supine SBP >140 with standing OH. Complicates management because treating one worsens the other.

Additional exam:

Provocative maneuvers:

Diagnostic Workup — Initial Labs, ECG, and Bedside Studies

— CBC — anemia (occult GI bleed, chronic disease) lowers threshold for symptoms

— BMP — sodium (hyponatremia from diuretics, SIADH, adrenal insufficiency), BUN/Cr (volume status, AKI), glucose (hyperglycemic diuresis or diabetic autonomic neuropathy)

— TSH — hypothyroidism worsens OH; hyperthyroidism can cause volume issues

— HbA1c — diabetic autonomic neuropathy is a top cause

— B12 — neuropathy contributor, common in elderly with PPI/metformin use

— Morning cortisol or ACTH stim if hyperpigmentation, hyponatremia/hyperkalemia, weight loss → adrenal insufficiency

— Rule out arrhythmia, ischemia, conduction disease, long QT, Brugada

— Look for low voltage + pseudo-infarct pattern → cardiac amyloidosis (common autonomic OH cause in elderly)

— Often more diagnostic than labs — document doses, timing, recent changes

— Calculate cumulative anticholinergic burden (ACB score ≥3 increases OH and falls)

— Documents supine nocturnal hypertension, morning surge or lack thereof, postprandial drops

— Particularly useful when symptoms don't match clinic readings

CCS pearl: In a CCS case of elderly syncope or recurrent falls, order orthostatic vitals, ECG, CBC, BMP, glucose, TSH, B12, HbA1c, urinalysis as the initial cluster — and reconcile medications before advancing to tilt-table or autonomic testing. Avoid head CT unless focal deficits or trauma.

Targeted basic labs:

ECG (mandatory in elderly with syncope or presyncope):

Urinalysis: specific gravity for volume status, glucose, infection

Medication reconciliation as a "test":

Postprandial BP measurement: If meal-related symptoms, formal postprandial monitoring 15-min intervals × 2 hr

24-hour ambulatory BP monitoring (ABPM):

Diagnostic Workup — Advanced and Confirmatory Studies

— Indications: equivocal bedside orthostatics, suspected delayed OH, recurrent unexplained syncope, suspected POTS or vasovagal/reflex syncope

— Protocol: 60–70° tilt for up to 45 min with continuous BP/HR

— Distinguishes: classic OH, delayed OH, POTS, vasovagal (mixed/cardioinhibitory/vasodepressor)

— Valsalva ratio and beat-to-beat BP — quantifies adrenergic and cardiovagal function

— Deep breathing HR variability — cardiovagal integrity

— QSART (quantitative sudomotor axon reflex test) — postganglionic sympathetic sudomotor

— Composite Autonomic Severity Score (CASS) — grades dysfunction

— Low supine norepinephrine that fails to rise with standing → postganglionic failure (pure autonomic failure, Parkinson disease)

— Normal/high supine NE that fails to rise → preganglionic (MSA)

— SPEP/UPEP, free light chains, fat pad biopsy → AL amyloidosis

— Cardiac MRI or PYP scan → ATTR cardiac amyloidosis

— Paraneoplastic panel (ANNA-1, CRMP-5, ganglionic AChR Ab) → autoimmune autonomic ganglionopathy

— MRI brain if MSA suspected (putaminal/cerebellar atrophy, "hot cross bun" sign)

— EMG/NCS for peripheral neuropathy

Board pearl: A patient with OH + erectile dysfunction + REM sleep behavior disorder + anosmia → prodromal Parkinson disease or MSA; refer to neurology for autonomic testing rather than just adjusting meds.

Head-up tilt-table testing:

Formal autonomic function testing (referral to autonomic lab):

Plasma catecholamines (supine and standing):

Targeted etiology workup:

Echocardiogram: Suspected AS, HFpEF, amyloidosis, hypovolemia

Loop recorder/Holter: If arrhythmia remains in differential after negative tilt

Risk Stratification and First-Line Management Logic

— Deprescribe/reduce offenders: alpha-blockers, diuretics, nitrates, TCAs, antipsychotics; consider tamsulosin → 5-alpha reductase inhibitor swap

— Correct volume depletion: stop unnecessary diuretics, treat anemia, address GI losses

— Optimize comorbidities: diabetes (glycemic control improves autonomic function modestly), thyroid, B12

— Fluid intake 2–2.5 L/day; salt 6–10 g/day (if no HF or severe HTN)

— Water bolus: 480 mL cold water rapidly → 30-min pressor effect, useful before meals or activities

— Compression: waist-high stockings (30–40 mmHg) and abdominal binders (more effective than stockings alone — splanchnic pooling is the main culprit)

— Head-of-bed elevation 10–20° (4–6 inches) — reduces nocturnal pressure natriuresis and supine HTN

— Physical counter-maneuvers: leg crossing, squatting, toe-raises, tensing buttocks before standing

— Slow positional changes, sit at bedside before standing

— Smaller, more frequent, low-carb meals; limit alcohol; avoid hot environments

— Exercise: recumbent biking, swimming, rowing — avoid prolonged standing

Step 3 management: The single highest-yield intervention in elderly OH is medication review and deprescribing — adding midodrine before stopping tamsulosin or HCTZ is a classic wrong answer on the boards.

Step 1 — Identify and reverse contributors (do this FIRST, before any new drug):

Step 2 — Non-pharmacologic measures (cornerstone, try ≥2 weeks before drugs):

Step 3 — Pharmacotherapy if symptomatic despite above

Treatment goal: Reduce symptoms and fall risk, not normalize BP. Target standing SBP >90–100 mmHg. Tolerating mild supine HTN (up to 160/90) is acceptable.

Pharmacotherapy — First-Line Drug Regimens

— Alpha-1 agonist prodrug → direct vasoconstriction

— Dose: 2.5–10 mg PO TID, given during waking hours only (last dose ≥4 hr before bedtime to avoid supine HTN)

— Onset 30–60 min, duration 3–4 hr — time before meals/activity

— Side effects: piloerection, scalp tingling, urinary retention, supine HTN

— Contraindications: severe CAD, urinary retention, pheochromocytoma, thyrotoxicosis

— Mineralocorticoid → Na/water retention, sensitizes vessels to catecholamines

— Dose: 0.1–0.2 mg daily (max 0.3 mg)

— Side effects: hypokalemia (monitor K), edema, supine HTN, HF exacerbation, headache

— Avoid in HF, CKD with volume overload; monitor weight, BP, electrolytes

— Approved for neurogenic OH in PD, MSA, pure autonomic failure

— 100–600 mg TID; titrate; same supine HTN concerns

— Expensive; second-line after midodrine

— Pyridostigmine 30–60 mg TID — cholinesterase inhibitor, modest BP effect, minimal supine HTN (good for those with concurrent supine HTN)

— Octreotide — for refractory postprandial OH; SQ before meals

— Atomoxetine — emerging option, low-dose, useful in central autonomic failure

— Desmopressin at bedtime — for nocturnal polyuria worsening morning OH (monitor sodium closely)

Board pearl: Midodrine before meals + abdominal binder + head-of-bed elevation is the highest-yield combination for symptomatic neurogenic OH with supine HTN.

Midodrine (first-line for neurogenic OH):

Fludrocortisone (first-line if volume depletion predominates):

Droxidopa (norepinephrine prodrug):

Adjunctive agents:

Managing supine HTN at night: Short-acting agents at bedtime if SBP >160 — losartan, hydralazine, transdermal nitroglycerin patch (remove on awakening), or captopril

Expanded Pharmacology and Refractory Management

— Volume-depleted, normal/high HR response, no HF → start fludrocortisone

— Neurogenic, blunted HR, autonomic failure → start midodrine; add fludrocortisone low-dose if inadequate

— Concurrent supine HTN → favor pyridostigmine or low-dose midodrine; avoid high-dose fludrocortisone

— Postprandial OH dominant → acarbose 50 mg with meals (slows carb absorption) or octreotide; caffeine 250 mg with breakfast helpful

— PD/MSA-related → droxidopa evidence strongest

— Erythropoietin if anemic (Hgb goal 11–12)

— Yohimbine, ergotamine — rarely used now

— Continuous abdominal binder during waking hours

— Sleep with head elevated nightly

— Do not treat daytime BP aggressively

— Bedtime snack and water can blunt overnight diuresis

— If supine SBP >160–180 → short-acting bedtime antihypertensive (losartan 50 mg, hydralazine 25 mg, or nitroglycerin patch 0.1 mg/hr removed AM)

— Avoid long-acting agents that carry over into morning

— Alpha-blockers (tamsulosin), TCAs, low-potency antipsychotics, nitrates, hydralazine, sildenafil, trazodone, clozapine

— Loop and thiazide diuretics unless essential for HF

— Anticholinergics worsen autonomic balance

Step 3 management: In an elderly Parkinson patient on levodopa with symptomatic OH — don't stop levodopa; add droxidopa or midodrine, elevate HOB, and use abdominal binder. Reducing levodopa worsens function without consistently improving BP.

Drug selection logic:

Combination therapy: Midodrine + fludrocortisone is common; titrate one at a time. Add pyridostigmine if supine HTN limits dosing.

Refractory cases:

Managing supine hypertension (present in 50% of neurogenic OH):

Drugs to avoid or minimize in elderly with OH:

Special Populations — Elderly with Renal or Hepatic Impairment

— Reduced baroreflex sensitivity, decreased beta-receptor responsiveness, stiffer arteries, lower plasma volume, blunted renin/aldosterone

— Higher prevalence of supine HTN coexisting with standing OH (~50%)

— Polypharmacy is the dominant modifiable factor

— Peripheral alpha-1 blockers (doxazosin, terazosin) for routine HTN

— TCAs, first-gen antihistamines, anticholinergics

— Nitrofurantoin (if CrCl low), benzodiazepines (fall risk synergy)

— Fludrocortisone — caution; risk of volume overload, hyperkalemia paradoxically less but monitor closely; avoid in eGFR <30 with volume overload

— Midodrine — renally eliminated metabolite (desglymidodrine); use lower starting dose 2.5 mg, titrate slowly in CKD

— Dialysis patients: intradialytic hypotension overlaps — adjust ultrafiltration goals, use midodrine 30 min pre-dialysis

— Midodrine prodrug requires hepatic conversion → reduced efficacy; monitor response

— Droxidopa metabolism less affected; safer hepatic option

— Avoid aggressive salt/fluid loading and fludrocortisone — risk decompensation

— Prefer compression, abdominal binder, midodrine, HOB elevation

— Reduce diuretics to minimum effective dose; consider torsemide over furosemide (smoother profile)

Key distinction: In elderly with HFpEF + OH, do NOT use fludrocortisone or aggressive salt loading — choose midodrine + mechanical measures. Confusing OH management with general volume repletion is a common board trap.

Elderly-specific physiology:

Beers Criteria–flagged drugs to deprescribe:

CKD considerations:

Hepatic impairment:

HFpEF (common in elderly with OH):

Cognitive impairment: OH independently accelerates cognitive decline. Use simplified regimens, caregiver education, and pillboxes.

Special Populations — Other Demographic Subgroups

— Prevalence rises with duration and poor glycemic control

— Resting tachycardia, exercise intolerance, silent ischemia, OH

— Tight glycemic control slows progression (DCCT/EDIC) but rapid lowering can transiently worsen

— Avoid SGLT2 inhibitor initiation in volume-depleted, symptomatic OH patients until stabilized

— OH is part of diagnostic criteria for MSA

— PD with OH at diagnosis is uncommon → red flag for MSA

— Levodopa can worsen OH but rarely needs discontinuation; add midodrine/droxidopa

— Autonomic dysreflexia coexists with OH; abdominal binders essential

— Tilt-up programs during rehab

— Supine hypotension syndrome in 3rd trimester (aortocaval compression) — distinct entity; manage with left lateral decubitus positioning

— True OH less common; investigate volume status, anemia, hyperemesis

— Think POTS (HR rise >30 bpm or >120 standing without BP drop) — manage with salt/fluids, exercise reconditioning, beta-blockers, midodrine

— Vasovagal syncope distinct — reflex-mediated, prodrome of nausea/diaphoresis

— Bed rest >3 days causes deconditioning OH — graduated mobilization, tilt-up, recumbent exercise

Board pearl: Young woman with chronic fatigue, palpitations on standing, HR rise >30 bpm without BP drop = POTS, not OH. First-line: increased salt/fluids and graduated exercise (recumbent → upright), then propranolol or midodrine.

Diabetes mellitus (cardiovascular autonomic neuropathy, CAN):

Parkinson disease and MSA:

Spinal cord injury (high thoracic/cervical):

Pregnancy:

Adolescents/young adults:

Post-bariatric surgery: Late-onset OH from autonomic neuropathy (B1, B12 deficiency) — replete vitamins

Athletes/deconditioned post-hospitalization:

Complications and Adverse Outcomes

— OH increases fall risk 2–3 fold in elderly

— Hip fractures carry 20–30% 1-year mortality — OH is a modifiable upstream cause

— Falls also cause subdural hematomas (especially on anticoagulants), TBI, lacerations

— Driving syncope → MVCs → state-specific reporting obligations

— Recurrent ED visits, hospitalization deconditioning cycle

— Independent risk factor for MI, stroke, HF, atrial fibrillation, and all-cause mortality

— ARIC study: OH at baseline → increased CHD and stroke over decades

— Mechanism: cerebral and coronary hypoperfusion, BP variability, supine HTN end-organ damage

— Repeated cerebral hypoperfusion accelerates white matter disease and cognitive decline

— OH associated with increased risk of all-cause dementia and Alzheimer disease

— Untreated supine HTN → LVH, CKD progression, hemorrhagic stroke, pressure natriuresis with nocturia worsening morning OH

— Recurrent hypoperfusion → AKI, especially with NSAIDs/ACEi/ARB

— Activity restriction, social isolation, depression, loss of independence

— Fludrocortisone: hypokalemia, HF exacerbation, edema

— Midodrine: supine HTN, urinary retention, scalp pruritus

— Untreated OH leads to inappropriate withholding of beneficial antihypertensives in supine HTN — worsens long-term CV risk

CCS pearl: In a CCS case where an elderly patient presents post-fall with hip pain — after stabilizing, document orthostatics, reconcile meds, and address OH before discharge; failure to do so risks recurrent falls and counts against the case score.

Falls and fractures:

Syncope and trauma:

Cardiovascular outcomes:

Cognitive decline and dementia:

Supine hypertension complications:

Renal:

Quality of life:

Medication adverse effects:

When to Escalate Care — Inpatient Triage and Consults

— Syncope with injury, especially head trauma on anticoagulation

— New OH with suspected GI bleed, sepsis, MI, PE, adrenal crisis

— Symptomatic OH not correctable in ED (persistent SBP <90 standing despite fluids)

— Suspected severe dehydration with AKI, electrolyte derangements

— New or worsening neurologic findings → admit for stroke/MSA workup

— Hemodynamic instability requiring vasopressors

— Adrenal crisis (hypotension + hyponatremia + hyperkalemia + hypoglycemia)

— Massive GI bleed or sepsis driving OH

— Autonomic storm in Guillain-Barré or autoimmune autonomic ganglionopathy

— Cardiology: structural heart disease, arrhythmia, tilt-table interpretation

— Neurology / Autonomic specialist: suspected MSA, PD, pure autonomic failure, neuropathy, formal autonomic testing

— Endocrinology: suspected adrenal insufficiency, pheochromocytoma (paroxysmal HTN/hypotension)

— Geriatrics: polypharmacy, falls, comprehensive geriatric assessment

— PT/OT: gait/balance training, home safety, assistive devices

— Pharmacy: medication reconciliation, deprescribing

— Refractory symptoms despite standard therapy

— Diagnostic uncertainty regarding subtype

— Suspected secondary autonomic failure (amyloidosis, paraneoplastic)

Step 3 management: Elderly patient with first syncope and head laceration on warfarin — admit, head CT, reverse if bleed, telemetry, orthostatic vitals q-shift, falls consult and PT before discharge. Never discharge from ED without addressing the upstream cause.

Admit/observation indications:

ICU criteria:

Consultations:

Outpatient referral thresholds:

Key Differentials — Same-Category Causes (Other Causes of Orthostatic Symptoms)

— Prodrome of nausea, diaphoresis, pallor, warmth

— Triggers: prolonged standing, emotional, pain, micturition, defecation

— HR drops with BP drop (cardioinhibitory) or BP alone (vasodepressor)

— Tilt-table: characteristic mixed response after prolonged tilt

— Management: hydration, counter-maneuvers, avoid triggers, midodrine if recurrent

— HR rise ≥30 bpm (≥40 in adolescents) within 10 min standing, no BP drop

— Young women, post-viral, hypermobility (Ehlers-Danlos)

— Management: salt/fluids, exercise reconditioning, beta-blocker, ivabradine, midodrine

— Beat-to-beat BP drop in first 15 sec, recovers spontaneously

— Common in young and tall individuals; reassurance + counter-maneuvers

— BP drop after 3 min standing; often progresses to classic OH; early autonomic failure marker

— SBP drop ≥20 within 2 hr of meal; splanchnic pooling

— Manage with smaller meals, acarbose, caffeine, water before meals

— Post-exercise vasodilation; rule out aortic stenosis, HCM

— Drug-mediated, not autonomic — reverses with deprescribing

Key distinction: POTS = HR up, BP stable; OH = BP down, HR variable; vasovagal = both drop after prolonged trigger with prodrome. This trifecta differentiation is a near-universal board stem.

Vasovagal (reflex/neurally mediated) syncope:

POTS (Postural Orthostatic Tachycardia Syndrome):

Initial OH (transient):

Delayed OH:

Postprandial hypotension:

Exercise-induced hypotension:

Medication-induced "pseudo-OH":

Key Differentials — Other-Category Causes of Dizziness/Syncope

— Arrhythmia: bradyarrhythmia (sick sinus, AV block), tachyarrhythmia (VT, AF with RVR)

— Structural: severe AS (exertional syncope classic), HCM, severe MS, atrial myxoma

— Ischemic: MI presenting as syncope in elderly, especially inferior with RV involvement

— PE: massive PE → syncope with hypotension

— Workup: ECG, echo, troponin, ambulatory monitoring

— Vertebrobasilar TIA: associated focal neuro signs, diplopia, dysarthria

— Seizure: tongue biting, postictal confusion, no orthostatic relationship

— Subclavian steal: arm exertion → posterior circulation symptoms; differential BP between arms

— Hypoglycemia — diaphoresis, mental status changes; check glucose first in any syncope

— Adrenal insufficiency — hyponatremia, hyperkalemia, hyperpigmentation

— Pheochromocytoma — paroxysmal HTN with orthostatic drops

— Carcinoid syndrome — flushing, diarrhea

— GI bleed (occult), anemia, dehydration

— Not true syncope; positional vertigo with nystagmus, no BP change — Dix-Hallpike test

— Frequent episodes, eyes closed, no BP/HR change on tilt; consider after organic causes excluded

Board pearl: Exertional syncope in elderly = aortic stenosis until echo proves otherwise — not OH. Always auscultate and get an echo before attributing exertional syncope to autonomic causes.

Cardiac syncope (must rule out — highest mortality):

Neurologic mimics:

Metabolic/endocrine:

Hematologic/volume:

Vestibular dizziness (BPPV, vestibular neuritis):

Psychogenic pseudosyncope:

Secondary Prevention and Long-Term Plan

— Fluid goal 2–2.5 L/day with measured intake

— Salt 6–10 g/day unless HF/CKD limits

— Compression garments worn during all waking hours

— HOB elevated 4–6 inches nightly (use bed risers, not just extra pillows)

— Counter-maneuvers practiced daily

— Rapid water bolus (480 mL) before known triggers (morning, post-meal, before activity)

— Updated reconciled list with explicit STOP list

— Communicate deprescribed agents to PCP and pharmacy

— Pillbox or blister pack

— If on midodrine — explicit timing card (e.g., 8 AM, 12 PM, 4 PM; no dose after 6 PM)

— Bedtime antihypertensive only if documented supine HTN >160

— Diabetes: A1c 7–8% in frail elderly (avoid hypoglycemia)

— BP target individualized — SPRINT-style aggressive targets often inappropriate in OH; standing SBP >100 is the floor

— Anemia: investigate and treat; iron, EPO if indicated

— Treat depression (avoid TCAs)

— Home safety assessment (rugs, lighting, bathroom grab bars)

— Vitamin D 800–1000 IU daily

— Vision and hearing evaluation

— Footwear review

— PT for gait/balance, Otago or tai chi program

Step 3 management: A successful discharge plan for OH integrates deprescribing, mechanical measures, targeted pharmacotherapy, fall prevention, and structured follow-up — partial plans (drug-only) score poorly and predict readmission.

Sustainable lifestyle prescription (written, given to patient):

Medication stewardship at discharge:

Comorbidity optimization:

Fall prevention bundle:

Vaccinations and routine care continue per age guidelines

Patient/caregiver education materials in plain language

Follow-Up, Monitoring, and Counseling

— 1–2 weeks after initiation/change of pharmacotherapy: home BP log review, supine and standing readings AM and PM

— 4–6 weeks for titration assessment

— Every 3–6 months stable, with annual comprehensive geriatric reassessment

— Sooner if new falls, syncope, or medication changes

— Home BP cuff: supine 5 min then standing at 1 and 3 min, AM and bedtime

— Symptom diary correlating timing, meals, activities

— Daily weights if on fludrocortisone (>2 lb/day gain = call)

— Fludrocortisone: BMP at 1–2 weeks, then every 3 months — watch K+ (hypokalemia), sodium, edema

— Midodrine: monitor for urinary retention, supine HTN

— Droxidopa: BP supine and standing

— Rise in stages: legs over bed → sit 30 sec → stand slowly

— Avoid prolonged motionless standing

— Avoid hot showers, saunas, large carb-heavy meals, alcohol

— Take midodrine before activity, not after symptoms

— Driving: discuss restrictions if syncope; report per state law

— Hot weather/illness: increase fluids; hold diuretics if dehydrated and call

— Recumbent biking, rowing, swimming 20–30 min, 3–5×/week

— Resistance training of legs strengthens venous return muscle pump

CCS pearl: When advancing the clock in a CCS OH case, schedule the 2-week follow-up with home BP log review — this is a high-scoring step. Don't just discharge to "follow up as needed."

Follow-up cadence:

Home monitoring instructions:

Lab monitoring:

Counseling points:

Cardiac rehab/exercise prescription:

Care coordination: PCP, cardiology/neurology, pharmacy, PT, home health when indicated

Ethical, Legal, and Patient Safety Considerations

— Syncope while driving or recurrent presyncope mandates counseling against driving until controlled

— State-specific reporting laws (e.g., California, Oregon, Pennsylvania require physician reporting of conditions impairing driving; most states permit but don't mandate)

— Document the conversation explicitly in the chart

— Typical recommendation: no driving for 6 months after unexplained syncope, shorter (1–3 months) if cause identified and treated

— Capacity assessment when OH coexists with cognitive impairment — assess for the specific decision

— Deprescribing an antihypertensive that increases stroke risk slightly but reduces fall risk substantially — discuss tradeoffs, document shared decision-making

— Off-label droxidopa or atomoxetine — disclose

— Hospital → home: medication reconciliation errors are the #1 source of OH worsening; explicitly communicate held/stopped diuretics, alpha-blockers

— SNF transfers: written orthostatic vitals protocol, fall precautions, HOB elevation

— Pre-op: anesthesia consult, hold ACE/ARB morning of surgery, expect perioperative OH

— Recognize when OH symptoms (dizziness) trigger inappropriate new prescriptions (meclizine, benzodiazepines) — break the cascade

— Elder abuse/neglect if dehydration or untreated falls reflect neglect — required reporting in all states

— In frail elderly with progressive autonomic failure (MSA), early goals-of-care conversation, POLST

Board pearl: A Step 3 question about an elderly patient who fell, was discharged without medication reconciliation, then re-presented within 72 hours — the answer is "improve transitions of care with explicit medication reconciliation", framed as a patient safety/systems issue.

Driving safety and reporting:

Informed consent edge cases:

Transitions of care (highest-yield Step 3 safety domain):

Polypharmacy and the "prescribing cascade":

Mandatory reporting:

Advance care planning:

High-Yield Associations and Rapid-Fire Clinical Facts

Key distinction: Neurogenic OH (HR doesn't rise) requires pharmacotherapy; non-neurogenic OH (HR rises briskly) usually responds to deprescribing and volume — get the HR right and you get the management right.

OH + parkinsonism + early autonomic failure → think MSA (not PD) — refer to neurology

OH + neuropathy + macroglossia + periorbital purpura → AL amyloidosis

OH + low voltage ECG + thick LV walls on echo → cardiac amyloidosis (AL or ATTR); order PYP scan

OH + erectile dysfunction + REM sleep behavior disorder + anosmia → prodromal synucleinopathy (PD/MSA/DLB)

OH + hyperpigmentation + hyponatremia/hyperkalemia → primary adrenal insufficiency

OH after starting tamsulosin for BPH → classic alpha-blocker effect; switch to finasteride

OH + postprandial worsening + diabetes → diabetic autonomic neuropathy

OH + paraneoplastic features (small cell lung cancer) → autoimmune autonomic ganglionopathy (anti-ganglionic AChR Ab)

OH + nocturia + supine HTN → autonomic failure with pressure natriuresis; HOB elevation key

OH + young woman + hyperflexible joints → POTS with Ehlers-Danlos overlap

Coat-hanger pain (suboccipital/shoulder) on standing → pathognomonic for neurogenic OH

Postprandial OH treatment: acarbose with meals, caffeine after meals, water bolus before meals

First-line drug for neurogenic OH = midodrine; first-line if volume depleted = fludrocortisone

Last midodrine dose: ≥4 hours before bedtime

Fludrocortisone monitoring: potassium (hypokalemia), weight, edema

Compression: abdominal binder > stockings (splanchnic pooling is the main culprit)

Initial test in elderly with falls: orthostatic vitals, ECG, CBC, BMP, glucose, TSH, B12, A1c

Tilt-table indication: equivocal bedside OH, suspected delayed OH, recurrent syncope, suspected POTS

Avoid in OH: alpha-blockers, TCAs, nitrates, diuretics (when possible)

Board Question Stem Patterns

— 78-year-old with HTN on HCTZ and tamsulosin presents after fall. Orthostatic vitals show 30/10 drop. Best next step? → Discontinue tamsulosin and HCTZ; trial non-pharmacologic measures (not start midodrine).

— Patient on levodopa with symptomatic OH. Best next step? → Add midodrine or droxidopa, HOB elevation, abdominal binder. Don't stop levodopa.

— Standing SBP 85, supine SBP 180 in autonomic failure. Management? → Avoid daytime antihypertensives, use bedtime short-acting (losartan or nitroglycerin patch removed AM), HOB elevation, midodrine during day.

— Elderly diabetic with dizziness 30 min after breakfast. Treatment? → Smaller low-carb meals, acarbose with meals, caffeine, water bolus pre-meal.

— 25-year-old woman, HR rises from 75 to 130, SBP unchanged. Diagnosis? → POTS, not OH.

— Elderly with syncope while walking, harsh systolic murmur. Next step? → Echocardiogram for aortic stenosis — not autonomic workup.

— OH + low-voltage ECG + thick LV + bilateral CTS history. → Pyrophosphate scan, light chains, refer.

— OH + hyponatremia + hyperkalemia + hyperpigmentation. → Cosyntropin stim; treat with hydrocortisone + fludrocortisone.

— Patient readmitted after discharge with recurrent falls; meds not reconciled. Best systems improvement? → Pharmacist-led medication reconciliation at discharge.

— Recurrent unexplained syncope, normal bedside orthostatics, normal echo and Holter. → Head-up tilt-table testing.

Step 3 management: Recognize that the "best next step" in OH cases is almost always deprescribe before prescribe, and mechanical measures before pharmacotherapy.

Pattern 1 — Falls in elderly with polypharmacy:

Pattern 2 — Parkinson with worsening OH:

Pattern 3 — Supine HTN with OH:

Pattern 4 — Postprandial OH:

Pattern 5 — POTS vs OH distinction:

Pattern 6 — Exertional syncope:

Pattern 7 — Cardiac amyloidosis:

Pattern 8 — Adrenal insufficiency:

Pattern 9 — Transition-of-care error:

Pattern 10 — Tilt-table use:

One-Line Recap

Orthostatic hypotension in the elderly is a sustained postural BP drop (≥20/10 mmHg within 3 minutes) that demands deprescribing of offending agents, mechanical/lifestyle measures, and — only if symptoms persist — targeted pharmacotherapy with midodrine for neurogenic OH or fludrocortisone for volume-depleted OH, while balancing the common coexistence of supine hypertension.

Board pearl: The single highest-yield Step 3 intervention for elderly OH is medication reconciliation with deprescribing, integrated with mechanical measures and structured follow-up — pharmacotherapy is the last, not the first, step.

Diagnose right: Measure supine then 1- and 3-min standing BP; HR fails to rise in neurogenic OH (>15 bpm rise suggests volume/drug-mediated); check meds, CBC, BMP, glucose, TSH, B12, A1c, ECG.

Treat right: Reverse contributors first — stop alpha-blockers, diuretics, TCAs, nitrates; then water 2–2.5 L, salt 6–10 g, abdominal binder, HOB elevation, counter-maneuvers; only then start midodrine (last dose ≥4 hr before bed) or fludrocortisone (monitor K and weight); add bedtime short-acting antihypertensive only if documented supine HTN >160.

Watch for traps: Exertional syncope = think aortic stenosis; PD with early prominent OH = think MSA; OH + low-voltage ECG + thick LV = cardiac amyloidosis; HR up but BP stable in a young woman = POTS; OH after meals in diabetic = postprandial OH treated with acarbose.

Close the loop: Reconcile meds at every transition, schedule 1–2 week follow-up with home BP logs, address fall prevention (PT, vitamin D, home safety, vision/hearing), counsel on driving safety, and document shared decision-making about the supine HTN vs OH tradeoff.