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Computer Simulation of Effects of Altered Gravity on Cardiovascular System in Astronauts
Author(s): 
Pages: 101-108
Year: Issue:  2
Journal: Space Medicine & Medical Engineering

Keyword:  altered gravitycardiovascular systemmatlabcomputer simulation;
Abstract: Objective To study the effects of altered gravity on human cardiovascular system by establishing the simulation model and conducting the computer simulation. Methods A Matlab / Simulink model based on the theory of elastic reservoir model was established by integrating the gravity factor into the existing mathematical model of the human cardiovascular system. Then the computational simulation was carried out to figure out the changes of the key parameters of the cardiovascular system. Results The wave shape of the systemic arterial pressure,left and right ventricular pressure,volume and blood flow turned out to be the same with that under1 G when the gravity was altered. However,the diastolic pressure and systolic pressure decreased,the left and right ventricular pressure,the volume and blood flow increased when the gravity level decreased. The simulation results of the heart rate and mean artery pressure were consistent with the experimental results. Conclusion The model can simulate the changes of the cardiovascular system quickly and accurately under altered gravity
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