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Cardiovascular responses of women to lower body negative pressureThe effects of lower body negative pressure (LBNP) on the cardiovascular response of 20 women between 23-43 years are evaluated. Calf circumference and cardiovascular data were recorded for women in the follicular and luteal phases of the menstrual cycle at -30, -40, and -50 mm Hg LBNP. The data reveal that the two menstrual phases did not cause differences in the way women respond to LBNP. It is observed that during LBNP calf circumference is enlarged; transthoracic impedance, and heart rate are increased; stroke volume, left ventricular ejection time, the Heather Index of contractility and systolic pressure, and cardiac output are reduced; and total peripheral resistance is elevated. The experimental data are compared to Montgomery et al. (1979). It is noted that the response of women to -50 mm Hg LBNP is similar to that of men; however, women adapt to stresses on the cardiovascular system with greater heart rate adjustments.
Document ID
19860057041
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Frey, M. A. B.
(NASA John F. Kennedy Space Center Cocoa Beach, FL, United States)
Mathes, K. L.
(NASA John F. Kennedy Space Center Cocoa Beach, FL, United States)
Hoffler, G. W.
(NASA Kennedy Space Center; Bionetics Corp. Cocoa Beach, FL, United States)
Date Acquired
August 12, 2013
Publication Date
June 1, 1986
Publication Information
Publication: Aviation, Space, and Environmental Medicine
Volume: 57
ISSN: 0095-6562
Subject Category
Aerospace Medicine
Accession Number
86A41779
Distribution Limits
Public
Copyright
Other

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