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为了解居住高原对青年战士心血管的影响，对进驻海拔５０００ｍ以上地区前及居住１年后和返回平原１年的同一群体５８名青年拍摄正、侧位Ｘ线胸片，测量心血管有关指标。结果表明：上高原１年后其心脏长径显著缩小（Ｐ＜０．０１）；心脏面积缩小，但相差不显著，心脏宽径、心脏深径及心脏体积显著增加（Ｐ＜０．００１或Ｐ＜０．０１）；右心房宽径、右心房高径、右心室高径、左室壁厚度、肺面积、升主动脉横径、主动脉结横径、肺动脉干横径、肺动脉段突度及右肺下动脉横径均显著增加（Ｐ＜０．００１）。返回平原１年后，以上各指标均较上高原前增大，除心脏长径增大不显著外，其余均增大非常显著（Ｐ＜０．００１），说明进驻海拔５０００ｍ以上地区１年返回平原１年后心血管形态及功能难以恢复到上高原前水平
In order to understand the impact of the residential plateau on the cardiovascular health of young soldiers, 58 young adults of the same group who lived in an area above 5000m above sea level and lived for one year and returned to the plain for one year were examined by lateral X-ray and measurement of cardiovascular related indices . The results showed that the diameter of the heart was significantly reduced (P <0.01) after one year on the plateau; the area of the heart was reduced but the difference was not significant; the width of the heart, the diameter of the heart and the volume of the heart were significantly increased (P <0.001 or P <0.01); right atrium width, right atrium height diameter, right ventricular height diameter, left ventricular wall thickness, lung area, ascending aortic diameter, aortic node diameter, pulmonary artery diameter, pulmonary artery segment Degree and right inferior pulmonary artery diameter were significantly increased (P <0.001). After returning to the plain one year later, all the above indexes increased compared with that before the plateau, except the long diameter of the heart did not increase significantly (P <0.001), indicating that one year return to the area above 5000m One year after the plain, cardiovascular status and function are difficult to recover to the previous level of the plateau