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우주비행 직후 인체 심혈관계의 혈류역학적 변화에 대한 수치적 연구
심은보(E. B. Shim),고형종(H. J. Ko),T. Heldt,R. D. Kamm,R. G. Mark 한국전산유체공학회 2000 한국전산유체공학회 학술대회논문집 Vol.2000 No.10
Orthostatic stress in human cardiovascular system following spaceflight remains a critical problem in the current lifescience space program. The study presented in this paper is part of an<br/> ongoing effort to use mathematical models to investigate the effects of gravitational stresses on the cardiovascular system of normals and microgravity adapted individuals. We employ a twelve compartment lumped parameter representation of the hemodynamic system coupled to setpoint models of the arterial baroreflex and the cardiopulmonary reflex to investigate the transient response of heart rate to orthostatic stress. We simulate current hypotheses concerning the mechanisms underlying postspaceflight orthostatic intolerance over a range of physiologically reasonable values and compare the simulations to astronaut stand test data pre-and postflight.