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为了解模拟失重对心肺循环功能的影响，采用ＸＸＨ－２０００型小循环心功能检测仪，观察了６名健康男性青年在头低位－６°卧床７ｄ中右胸电导纳容积波图的变化。卧床中小循环心功能参数的主要变化是：卧床初期Ｑ－ｊ、Ｑ－ｊ／ｊ－ｚ降低，ｈｚ、ｈｃ、ｈｃ／ｈｚ升高；２４ｈ后ｊ－ｚ缩短，Ｑ－ｊ／ｊ－ｚ升高。提示卧床初期出现肺动脉压升高、左心前负荷、右心前负荷和心肌收缩力增加，肺静脉充血；第３ｄ后有右心收缩功能下降。在头低位卧床时可望用小循环心功能检测法评价心肺循环功能及左心前负荷的变化
In order to understand the effect of simulated weightlessness on cardiopulmonary circulatory function, the change of right chest electrocardiographic admittance volume wave in six healthy male adolescents at head-down-6 ° ambulation was observed by using XXH-2000 small circulation cardiac function detector. The main changes in cardiac function parameters of bed rest were: Q-j, Q-j / j-z decreased and hz, hc, hc / hz increased in early bedridden; j- Rise. Prompted ambulation early pulmonary hypertension, left ventricular preload, right ventricular preload and myocardial contractility increased, pulmonary venous congestion; after 3d reduced right ventricular systolic function. In the first lie low bed is expected to use small heart function test to evaluate cardiovascular function and changes in left ventricular preload