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P A Low, T L Opfer-Gehrking, S C Textor, R Schondorf, G A Suarez, R D Fealey, M Camilleri
Postural tachycardia syndrome (POTS) is characterized by orthostatic dizziness, tremulousness, tachycardia and variable blood pressure changes. Since some POTS patients have a marked reduction in pulse pressure on standing, a major mechanism of their symptoms might be venous pooling. We therefore studied the cardiovascular response to head-up tilt, Valsalva maneuver and deep breathing in: control subjects (n = 11; F = 8; M = 3; 39.2 +/- 14.4 years); patients with orthostatic hypotension secondary to autonomic failure (n = 11; F = 9; M = 2; 61...
December 15, 1994: Journal of the Autonomic Nervous System
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