Abstract

Orthostatic dizziness is a common dizziness syndrome characterized by non-vertiginous lightheadedness when patients rise to stand from a sitting or supine position. Orthostatic dizziness is commonly believed to derive from orthostatic hypotension (OH) or postural tachycardia syndrome (POTS). Tilt table test and Valsalva maneuver are standardized methods for evaluating of adrenergic autonomic function and essential for diagnosis of OH and POTS. We described the guidelines and interpretations of the tilt table test and Valsalva maneuver.

• Keywords: adrenergic function test; sympathetic; tilt table test; Valsalva maneuver; orthostatic dizziness;