PMID: 4055594Oct 1, 1985Paper

Hemodynamic effects of anti-G suit inflation in a 1-G environment

Journal of Applied Physiology
J F SeaworthE D Grassman

Abstract

This study evaluated effects of various anti-G inflation pressures on cardiac volumes and the relationship of these volume changes to mean arterial pressure changes. Ventricular volumes were calculated using two-dimensional echocardiography. An anti-G suit was inflated to 2, 4, and 6 psi in the standing and supine positions for 10 male subjects. In the supine position, mean arterial pressure increased from base line for all three inflation pressures (P = 0.05). The end-diastolic volume increased after 2-psi inflation (P = 0.03). Cardiac output or stroke volume did not change. After standing, mean arterial pressure (P = 0.002), end-diastolic volume (P = 0.002), and stroke volume (P = 0.05) fell after suit deflation. Peripheral vascular resistance fell in the 2- and 4-psi inflation profiles. In the standing protocol, mean arterial pressure, end-diastolic volume, stroke volume, and cardiac output rose with all three inflation pressures (P less than 0.05). After reclining, heart rate increased (P = 0.02) and mean arterial pressure fell (P less than 0.05) in the 4- and 6-psi inflation profiles after suit deflation. Increases in mean arterial pressure are caused by increases in cardiac preload and cardiac output after inflation of th...Continue Reading

Citations

Jan 1, 1989·European Journal of Applied Physiology and Occupational Physiology·C Y GuezennecJ Gutkowska
Dec 2, 2006·Journal of Applied Physiology·Jack M GoodmanLeonard S Goodman
Dec 29, 1999·Medicine and Science in Sports and Exercise·S M LeeS M Schneider
May 1, 1994·Journal of Clinical Pharmacology·L D TrippC Goodyear

Related Concepts

Diastolic Blood Pressure
Cardiac Output
Cardiac Volume
2D Echocardiography
Anti-Shock Trousers
Gravistimulation
Pulse Rate
Stroke Volume
Pulmonary Vascular Resistance

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