Comparison of the postural tachycardia syndrome (POTS) with orthostatic hypotension due to autonomic failure
PA Low, TL Opfer-Gehrking, SC Textor… - Journal of the autonomic …, 1994 - Elsevier
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 …
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 …
