Management of Lightheadedness

Initial Assessment and Risk Stratification

The American College of Emergency Physicians recommends immediately assessing orthostatic vital signs within 2 minutes of standing to identify orthostatic hypotension, and critically reviewing all medications, particularly antihypertensives, diuretics, and CNS agents, as these are the most common reversible causes of lightheadedness in clinical practice 1, 2
Patients over 60 years with cardiovascular disease require high-risk evaluation for cardiac syncope and arrhythmias, while patients under 45 years without cardiovascular disease are generally low-risk and likely have reflex-mediated or orthostatic causes 1
The presence of congestive heart failure on examination indicates higher risk of sudden death and warrants immediate cardiac evaluation 1

The European Society of Cardiology defines classical orthostatic hypotension as a blood pressure drop of ≥20/10 mmHg within 3 minutes, with symptoms more important than numeric changes 2
Initial orthostatic hypotension is defined as a blood pressure drop of >40 mmHg systolic or >20 mmHg diastolic within 15 seconds of standing, with rapid spontaneous recovery 2
Delayed orthostatic hypotension, common in the elderly, is defined as a blood pressure drop occurring beyond 3 minutes of standing 2, 3
Postural Orthostatic Tachycardia Syndrome (POTS) is characterized by a heart rate increase of ≥30 bpm (or ≥40 bpm in ages 12-19) within 10 minutes without significant blood pressure drop, primarily affecting young women 2, 3, 6

The American College of Emergency Physicians recommends an ECG when the history and physical examination do not reveal the etiology, or when cardiovascular disease is suspected, especially in patients over 60 years with cardiac history 1
Laboratory testing has low yield but may include complete blood count, comprehensive metabolic panel, and thyroid function in adolescents or when anemia/metabolic causes are suspected 6
Advanced testing, such as tilt-table testing or 24-hour Holter monitoring, may be considered if active standing test is inconclusive but symptoms strongly suggest orthostatic intolerance, or if arrhythmia is suspected 6

The European Society of Cardiology notes that elderly patients have a higher prevalence of asymptomatic orthostatic hypotension and are more susceptible to polypharmacy-induced orthostatic hypotension 1, 2, 3
Adolescents with chronic symptoms should be considered for POTS, especially young women with fatigue, palpitations, and orthostatic intolerance, frequently associated with recent infections, chronic fatigue syndrome, and joint hypermobility 2, 3, 6

The American College of Emergency Physicians recommends discontinuing or reducing unnecessary blood pressure-lowering medications when orthostatic hypotension is confirmed 5
Midodrine is FDA-approved for symptomatic orthostatic hypotension, with dosing starting at 2.5 mg three times daily and titrating to 10 mg three times daily, increasing standing systolic blood pressure by 15-30 mmHg at 1 hour, with effects lasting 2-3 hours 5