postural orthostatic tachycardia syndrome
A disorder characterized by excessive heart rate increase upon standing, often accompanied by symptoms of orthostatic intolerance.
Full Definition
Postural orthostatic tachycardia syndrome (POTS) is a form of dysautonomia characterized by an excessive increase in heart rate (≥30 bpm in adults, ≥40 bpm in adolescents) within 10 minutes of standing or head-up tilt, without significant orthostatic hypotension. Patients typically experience symptoms of orthostatic intolerance including lightheadedness, palpitations, fatigue, exercise intolerance, and near-syncope when upright. The syndrome primarily affects young women and may be associated with various underlying conditions including autoimmune disorders, deconditioning, or neuropathy. POTS involves abnormalities in autonomic nervous system function affecting heart rate regulation and blood pressure control during postural changes.
Usage
Usage note: Commonly abbreviated as POTS; emphasize postural component and diagnostic criteria.
In Context
- "Tilt table testing confirmed the diagnosis of postural orthostatic tachycardia syndrome." — Autonomic testing report
- "POTS management includes increased fluid intake, compression garments, and exercise conditioning." — Patient education materials