Electrocardiographic 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.


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    Titel :

    Vectorcardiographic results from Skylab medical experiment M092: Lower body negative pressure


    Beteiligte:


    Erscheinungsdatum :

    1977-01-01


    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Lower body negative pressure: Third manned Skylab mission

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    Lower body negative pressure: Third manned Skylab mission

    Johnson, R. L. / Hoffler, G. W. / Nicogossian, A. E. et al. | NTRS | 1977


    Results of Skylab medical experiment M171-metabolic activity

    Michel, E. L. / Rummel, J. A. / Sawin, C. F. et al. | NTRS | 1977


    Results of Skylab medical experiment M171: Metabolic activity

    Michel, E. L. / Rummel, J. A. / Sawin, C. F. et al. | NTRS | 1974


    Medical experiment M-171 - Results from the second manned Skylab mission

    Rummel, J. A. / Nichel, E. L. / Sawin, C. F. et al. | NTRS | 1976