中文摘要：

目的研究常驻西宁人员的心功能及心脏结构变化。方法应用彩色多普勒超声心动图检测73例常驻西宁5年以上人员的心功能、心脏结构变化,并与平原地区健康体检人员进行比较。结果常驻西宁人员的右心腔增大、肺动脉增宽发生率明显高于平原对照组（P〈0.05）,但心功能参数无明显减低（P〉0.05）。结论长期轻度缺氧可影响心脏结构,主要以右心腔增大、肺动脉增宽为特征,但对心功能无明显影响。

英文摘要：

Objective To investigate the heart function and cardiac structure changes in people residing in Xining.Methods The heart function and cardiac structure changes of 73 people who resided in Xining for more than 5 years were detected by color Doppler echocardiography.And their detection results were compared with the results of people who resided in the plain area and received the health examination.Results The incidence rate of right heart chamber augmentation and pulmonary artery widening in people in Xining was significantly higher than those in people in the plain（P0.05）.But the parameters of heart function in people in Xining did not obviously decrease（P0.05）.Conclusion Long-term hypoxia can affect the cardiac structure.The augmentation of right heart chamber and widening of the pulmonary artery are the main changes,but they do not obviously affect the heart function.