多普勒超声心动图评估高原驻守官兵左心功能

Evaluation of left heart function of officers and soldiers stationed at high plateau by Doppler echocardiography

目的:探讨驻守海拔2 800m官兵(A组,33名)和4 820m官兵(B组,25名)的左心功能变化特点。方法:利用飞利浦便携CX50型超声诊断仪对高原官兵行超声心动图检查,重点检查左室短轴舒张末内径(LVDd)、左房收缩末左右径(LASd)、右房收缩末左右径(RASd),右室舒张末左右径(RVDd),二尖瓣口E、A峰血流速度(MVE、MVA),二尖瓣环舒张早期速度(E’)、二尖瓣环舒张晚期速度(A’)。结果:B组官兵的MVE、MVA、E’、A’、E’/A’均低于A组官兵;B组官兵LVDd小于A组官兵。结论:驻守海拔超高的官兵左心室舒张功能较驻守海拔较高的官兵减低;驻守海拔超高的官兵左心室舒张末内径较驻守海拔较高官兵的小。

Objective：To analyze the difference of left heart function between the soldiers and officers who stationed at the altitude of 2 800 m group A n=33 and 4 820 m group B n=25. Methods：The echocardio- gram examination was performed for the officers and soldiers by using Philips CX50 portable ultrasonic diagnostic scanner,mainly focusing on left ventricular end--diastolic diameter （LVDd）,left atrium （LA）, right atrium （RA）, right ventricle （RV）, pulmonary artery （PA）, mitral valve flow peak E velocity and peak A velocity（MVE, MVA）, early diastolic mitral annulus velocity（E＇） ,and late diastolic mitral annulus velocity（A＇）. Results：the MVE,MVA,E＇ ,and E＇/A＇ in group B were all lower than those in group A. The LVDd in group B was smaller than that in group A. Conclusion：The left ventricular diastolic function of officers and soldiers at 4 820 m altitude could be reduced compared with that of 2 800 m,and the LVDd at 4 820 m is smaller.