The human cardiovascular system in the absence of gravityThe data collected from a Space Shuttle crew to investigate cardiovascular changes due to microgravity are presented. The experimental procedures which involved preflight, immediate postflight, and one week following postflight echocardiograms of 13 individuals are described. The immediate postflight results reveal a 20 percent decrease in stroke volume, a 16 percent decrease in left ventricular diastolic volume index (LVDVI), no change in systolic volume, blood pressure, or cardiac index, and a 24 percent increase in heart rate. One week later a 17 percent stroke volume increase, a 29 percent increase in cardiac index, and normal blood pressure, and LVDVI were observed. It is concluded that upon reexposure to gravity a readaptation process for the cardiovascular system occurs.
Document ID
19860031087
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bungo, M. W. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Charles, J. B. (NASA Johnson Space Center Houston, TX, United States)