【摘要】 对移居海拔2800米地区半年以上的25例男性青年,在其到达海拔4500米地区一个月后作超声心动图检查;在其回到海拔80米地区定居三个月后又作复查。结果是:海平与高原比较。心率变慢、右室等容舒张期缩短,肺动脉收缩压降低;但右室横径、右室流出道与右肺动脉内径无显著差异。海平每搏量与左室舒张末期容积增大,而心指数与排血分数有降低趋势;但每分心输出量大致相同。另外,比较了高原移居者平原恢复值与平原正常人的对照值。更多还原

【Abstract】 25 acclimatized young males to Germu(2,800 m. above sea level)were submitted to echocardiographic examination in Kunlun Pass(4,500 m.)one month after arrival,and then in Beijing(80 m.)after residing there for three months. The primary results were as follows.. A slower heart rate, a shorter isometric diastolic interval of right ventricle and a lower pulmonary systolic pressure were found at sea level in comparison with that at high altitude, but there was no statistical difference in transverse diameters of the right ventri-cle, the right ventricular tract and the right pulmonary artery. The stroke volume and the left ventricular end-diastolic volume were greater at sea level. The cardiac index and the ejection fraction showed a downward tendency from Kunlun Pass to Beijing, but the minute volume was practically identical.In addition, we made a comparison of the echocardiogram between two groups at sea level, one of them was those coming from high altitude. Finally, the possible significance of the changes presented above was discussed.更多还原