NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Vectorcardiographic results from Skylab medical experiment M092: Lower body negative pressureElectrocardiographic interval changes suggesting effects of increased vagal tone were observed early in some Gemini crewmembers. Preflight versus postflight amplitude differences appeared in electrocardiograms of several of the early Apollo crewmembers. In preflight and postflight crew evaluations of the last three Apollo flights, quantitative postflight vectorcardiographic changes were for the first time determined in American space crews. Changes not considered related to heart rate were mainly those of increased P and QRS vector magnitudes and orientation shifts. But since most of these postflight findings resembled those observed with the orthostatic stress of lower body negative pressure, it was inferred then that upon their return from space, these Apollo astronauts exhibited exaggerated responses to orthostasis in the vectorcardiogram as well as in measures of cardiovascular hemodynamics.
Document ID
19770026866
Document Type
Other
Authors
Hoffler, G. W.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Johnson, R. L.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Nicogossian, A. E.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Bergman, S. A., Jr.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Jackson, M. M.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1977
Publication Information
Publication: Biomed. Results from Skylab
Subject Category
Aerospace Medicine
Accession Number
77N33810
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available