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Adaptive responses of the cardiovascular system to prolonged spaceflight conditions: assessment with Holter monitoringThis article presents selected findings obtained with Holter monitoring from two crew members of the expedition, performed during a 175-day space mission on board orbital space station "MIR." Using mathematical processing of daily cardiointervals files, 5-minute sections of records were analyzed consecutively. Then, the average daily values of indices, the average-per-every-eight-hours values (morning, evening, night) and mean values per hour were computed. The results of analysis showed that prolonged exposure of man to microgravity conditions leads to important functional alteration in human neuroautonomic regulatory mechanisms. Both crew members had significant increase of heart rate, the rise of stress index, the decrease in power of the spectrum in the range of respiratory sinus arrhythmia. These marked signs of activation of the sympathetic section of the vegetative nervous system showed individual variations. The analysis of the daily collection of cardiointervals with Holter monitoring allows us to understand and forecast the functional feasibilities of the human organism under a variety of stress conditions associated with acute and chronic microgravity exposure.
Document ID
20040089526
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Baevsky, R. M.
(Institute of Biomedical Problems Moscow, Russia)
Bennett, B. S.
Bungo, M. W.
Charles, J. B.
Goldberger, A. L.
Nikulina, G. A.
Date Acquired
August 21, 2013
Publication Date
June 1, 1997
Publication Information
Publication: Journal of cardiovascular diagnosis and procedures
Volume: 14
Issue: 2
ISSN: 1073-7774
Subject Category
Aerospace Medicine
Distribution Limits
Public
Copyright
Other
Keywords
manned
NASA Center JSC
NASA Discipline Cardiopulmonary
long duration
Non-NASA Center
Flight Experiment
Mir Project

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