冠心病左心房局部功能的超声心动图评价

目的探讨应变率、速度图和位移图三种超声方法评价冠心病左心房局部功能的价值。方法应用常规超声心动图、应变率成像（SRI）、定量组织速度图（QTVI）和组织追踪显像（TTI），分别测量20例正常人与14例左心房内径正常的冠心病患者左心房内径、二尖瓣口血流频谱E峰、A峰和E／A值以及右上肺静脉血流频谱S峰、D峰、A谷和A波持续时间（ADT）、左心房侧壁和房间隔的应变率、速度和位移变化。比较两组测量结果。结果两组左心房内径、二尖瓣口血流频谱值、肺静脉血流频谱值、速度和位移之间的差异均无显著性意义，而两组左心房侧壁和房间隔应变率之间的差异具有显著性意义（P〈0．05）。结论应变率成像能够在左心室舒张功能尚无明显改变的情况下，早期发现左心房局部功能的异常。

Assessment of left atrial function with echocardiogram in CAD patients

Objective To evaluate left atrial(LA) local function in patients with coronary artery disease(CAD) by strain rate imaging. Methods LA lateral and septal strain rate, LA internal diameter, the peak flow velocities during early diastole(E),atrial contraction(A),E/A ratio, peak velocity of right upper pulmonary venous flow(PVs,PVd and PVa)and duration(ADT) were determined in 20 normal subjects and 14 patients with CAD and without left atrial dilatation by strain rate imaging(SRI) and traditional echocardiography. The results of two group were compared. Results Compared with control group, LA internal diameter, mitral valve flow pattern and pulmonary venous flow pattern were not significantly different. LA lateral and septal strain rate were of significant difference between CAD group and control group(P<0.05). Conclusion LA local dysfunction can be detected by strain rate imaging in patients without other echocardiographic features of cardiac diastolic function involvement.