无创伤法测定藏北高原男性青壮年心排出量的报告

Non-invasive determination of cardiac output on male youth and middle age in northern tibet region

采用无创伤法对150名居住于海拔4500m高原的男性青壮年心排出量进行了测定，并与平原居民测定结果进行了对比。平均心率移居组高于世居组（P＜0．01），平均动脉压两组间无显著差异（P＞0.05），每搏输出量移居组低于世居组（P＜0.01），但每分输出量两组无显著差异（P＞0．05），认为移居者以代偿性心率加快维持心输出量。移居组的平均心率、平均动脉压与平原组相近，但心搏量和心分出量均低于平原组（P＜0．01），与心缩力下降和血粘度增高有关．

Cardiac output of 150 male youth andmiddle age(Who lived in north tibet region,4500meters above sea level) were determined by non - invasive method and compared with the determined results of residents in plain area. Mean heart rate of migration group is higher than native group (P<0.01); mean arterial pressure between thetwo groups with no significant difference (P>0.05); output/pulsation of migrationgroup is lower than native group (P<0.01), but output/min of two groups with nosignificant difference (P>0.05).The writer considers that migratormaintains cardiac output volume by compensatory speed - up heart rate. The meanheart rate,mean arterial pressure of migration group is similar to plain area group,butstroke volume and cardiac output are lowerthan that of plain area group (P<0.01). Itis related with decreasing of miocardia power and increasing of blood viscosity.