Orthostatic Hypotension Diagnosis and Management

Diagnostic Criteria

The American College of Cardiology recommends a diagnostic threshold of ≥20 mmHg systolic or ≥10 mmHg diastolic drop for orthostatic hypotension, with a significant drop of 34 mmHg systolic observed in this patient 1, 2, 3
A supine to sitting drop of 150/78 → 116/78 = 34 mmHg systolic drop meets diagnostic criteria, even with improvement from sitting to standing (116/78 → 124/80) 1, 2, 3
The standard protocol requires measuring BP after 5 minutes supine/sitting, then at 1 and 3 minutes after standing, with a significant drop indicating orthostatic hypotension 1, 2, 3

The American Heart Association suggests reviewing all medications immediately and discontinuing or reducing those worsening orthostatic hypotension, prioritizing alpha-blockers, sedatives, psychotropic medications, and unnecessary blood pressure-lowering drugs 1, 4
Increasing fluid intake to 2-2.5 liters daily and liberalizing salt intake (8-10 grams daily unless contraindicated) can help manage orthostatic hypotension 1
Elevating the head of bed by 10 degrees can reduce nocturnal diuresis and supine hypertension 1
Teaching physical counterpressure maneuvers such as leg crossing, squatting, and arm tensing can acutely raise BP when symptoms occur 1

Withholding treatment in asymptomatic patients is not recommended, as orthostatic hypotension carries a 64% increase in age-adjusted mortality and increased risk of falls and fractures 1, 4
Monitoring for supine hypertension is crucial when treating orthostatic hypotension, with the goal of improving hypotension without excessive supine hypertension 1
Measuring BP in both arms initially and using the arm with higher readings (if difference >10 mmHg) for subsequent measurements is recommended 3
Extending standing time beyond 3 minutes if initial testing is negative but symptoms are present can identify delayed orthostatic hypotension 2, 3

A 12-lead ECG can rule out arrhythmias, conduction abnormalities, or structural heart disease 1
Laboratory studies should only be conducted if clinically indicated, based on history suggesting anemia, electrolyte abnormalities, or endocrine disorders 1
Considering 24-hour ambulatory BP monitoring can help detect patterns of BP variability and supine hypertension 3