| ＋Cz作用下兔心脏功能的改变 |
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| 引用本文： | 孙喜庆 蔡建辉. ＋Cz作用下兔心脏功能的改变[J]. 航天医学与医学工程, 1997, 10(4): 250-253 |
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| 作者姓名： | 孙喜庆 蔡建辉 |
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| 摘 要： |
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| 关 键 词： | 正加速度 加速度应激 心功能 心肌收缩 |
Changes of cardiac function during +Gz exposure in rabbits] |
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| X Sun,J Cai,Y Liu,L Xue,H Sun. Changes of cardiac function during +Gz exposure in rabbits][J]. Space Medicine & Medical Engineering, 1997, 10(4): 250-253 |
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| Authors: | X Sun J Cai Y Liu L Xue H Sun |
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| Affiliation: | Department of Aerospace Biodynamics, Fourth Military Medical University, Xi'an, China. |
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| Abstract: | Changes of cardiac function was studied during +Gz exposure in rabbits. Seven New Zealand rabbits were anesthetized and exposed to +2, +4, and +6 Gz (each for 30s, onset rate 1G/s, with 15 min interval in between). The left ventricular systolic pressure (LVSP), peak rate of left ventricular pressure rising (+dp/dtmax) and ECG were recorded. The results showed that during +2, +4 and +6 Gz exposures, LVSP decreased by 62.96% (P<0.01), 63.34% (P<0.01) and 82.01% (P<0.01) respectively, and +dp/dtmax decreased by 58.46% (P<0.01), 53.59% (P<0.01) and 63.06% (P<0.01) respectively, and the left ventricular end diastolic pressure decreased by 67.78 % (P>0.05), 332.74 % (P<0.01) and 500.54% (P<0.01) respectively, as compared with those of control. It is suggested that cardiac function is depressed with +Gz exposure. |
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