Mechanisms of hypotensive effects of a posture change from seated to supine in humans

• Published in: Acta physiologica Scandinavica Vol. 171; no. 4; pp. 405 - 412
• Main Authors: Pump, B., Kamo, T., Gabrielsen, A., Norsk, P.
• Format: Journal Article
• Language: English
• Published: Oxford UK Blackwell Science Ltd 01.04.2001; Blackwell Science
• Subjects: Adult; Atrial Function, Left - physiology; atrium; baroreceptors; Biological and medical sciences; blood pressure; Blood Pressure - physiology; Cardiac Output - physiology; Carotid Sinus - physiology; Fundamental and applied biological sciences. Psychology; Heart Rate - physiology; Hemodynamics. Rheology; Humans; Hypotension, Orthostatic; immersion; Male; peripheral vascular resistance; posture; Pressoreceptors - physiology; Space life sciences; supine position; Supine Position - physiology; Vertebrates: cardiovascular system; Water; Human; Induced arterial hypotension; Stimulation; Immersion; Artery; Posture; Vascular resistance; Blood vessel; Carotid; Hydrostatic pressure; Blood pressure; Circulatory system; Hemodynamics; Baroreceptor

The hypothesis tested was that the hydrostatic stimulation of carotid baroreceptors is pivotal to decrease mean arterial pressure at heart level during a posture change from seated to supine. In eight males, the cardiovascular responses to a 15‐min posture change from seated to supine were compared...