Arterial pressure in humans during weightlessness induced by parabolic flights

Danish Aerospace Medical Centre of Research and Cardiovascular Laboratory, National University Hospital, DK-2200 Copenhagen, Denmark Results from our laboratory have indicated that, compared with those of the 1-G supine (Sup) position, left atrial diameter (LAD) and transmural central venous pressur...

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Bibliographic Details
Published in:Journal of applied physiology (1985) 1999-09, Vol.87 (3), p.928-932
Main Authors: Pump, Bettina, Videbak, Regitze, Gabrielsen, Anders, Norsk, Peter
Format: Article
Language:English
Subjects:
Adult
Atrial Function, Left - physiology
Biological and medical sciences
Blood pressure
Blood Pressure - physiology
Central Venous Pressure - physiology
Female
Fundamental and applied biological sciences. Psychology
Heart Rate - physiology
Hemodynamics. Rheology
Humans
Male
Middle Aged
Posture
Pressoreceptors - physiology
Space life sciences
Supine Position - physiology
Vasodilation - physiology
Vertebrates: cardiovascular system
Weightlessness
Weightlessness - adverse effects
Weightlessness Simulation - methods
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Summary:Danish Aerospace Medical Centre of Research and Cardiovascular Laboratory, National University Hospital, DK-2200 Copenhagen, Denmark Results from our laboratory have indicated that, compared with those of the 1-G supine (Sup) position, left atrial diameter (LAD) and transmural central venous pressure increase in humans during weightlessness (0 G) induced by parabolic flights (R. Videbæk and P. Norsk. J. Appl. Physiol. 83: 1862-1866, 1997). Therefore, because cardiopulmonary low-pressure receptors are stimulated during 0 G, the hypothesis was tested that mean arterial pressure (MAP) in humans decreases during 0 G to values below those of the 1-G Sup condition. When the subjects were Sup, 0 G induced a decrease in MAP from 93 ± 4 to 88 ± 4 mmHg ( P  
ISSN:8750-7587
1522-1601
DOI:10.1152/jappl.1999.87.3.928