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Echocardiographic evaluation of Space Shuttle crewmembersEchocardiographic measurements of left ventricular volume were obtained from 17 members of four Space Shuttle crews before and after 5- to 8-day space flights. Measurements obtained 1 h after landing indicated increases in the heart rate (HR), mean arterial pressure, and systemic vascular resistance values. On the other hand, the end-diastolic volume index (EDVI) fell 17 ml/sq m, and the stroke volume index (SVI) fell 15 ml/sq m. Measurements taken 1-2 weeks later demonstrated that the HR values returned to normal, but the EDVI and SVI values remained significantly below preflight levels, despite the ability of the subjects to ambulate and exercise. The results indicate that a space flight induces significant changes in heart volume affecting the left-ventricle function. It is suggested that the prolonged recovery period is related to the high level of aerobic conditioning in these subjects.
Document ID
19870044731
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Bungo, M. W.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Goldwater, D. J.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Popp, R. L.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Sandler, H.
(NASA Johnson Space Center Houston, TX; NASA, Ames Research Center, Moffett Field; Stanford University, CA, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Publication Information
Publication: Journal of Applied Physiology
Volume: 62
ISSN: 0161-7567
Subject Category
Aerospace Medicine
Accession Number
87A32005
Distribution Limits
Public
Copyright
Other

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