【摘要】 为探讨自身调节机制对高原心搏量的影响,本文应用超声心动图测定南京、西宁与哈尔盖三组健康男性铁路职工的心泵功能。结果如下:西宁组、哈尔盖组心搏量分别为83、86ml,而南京组为75ml,差异显著(P 值分别小于0.05、0.005);三组心率无差异;西宁与哈尔盖组心搏量的增加和维持是由于前负荷增加,哈尔盖组除前负荷增加外,还显示心脏收缩增强与后负荷减小。提示自身调节机制对高原心搏量的调节有重要作用,利于心功代偿。更多还原

【Abstract】 In order to investigate the influence of the mechanism of autoregulation on stroke volume(SV)at high altitude,the measurement of cardiac pump function in three groups of normal male railway employees(Nanjing;Xining and Haergai)by echocardiography was made.The results were as follows:the SV in Xining and Haergai groups were 83 ml,and 86 ml,but 75 ml in Nanjing group.There were significant differences between the high altitude and plain groups(P<0.05;P<0.005 respectively).There was no signifi- cant difference in heart ratte betwecn the three groups.The SV increase and its mainte- nce were due to increased preload in Xining and Haergai,while the cardiac contractility increase andpostl oad decrease were also showed in Haergai.The results indicate that the mechanism of autoregulation does play an important role in the regulation of the SV at high altitude and hence make a benefit to the compensation of the cardiac pump function.更多还原