应变率成像和定量组织速度图评价左心房局部功能的比较

目的 探讨应变率成像和定量组织速度图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）和定量组织速度图（TVI），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值以及左心房侧壁和房间隔的应变率及速度变化。比较两组测量结果。 结果 两组左心房内径、二尖瓣口血流频谱测值和速度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。

Evaluation of Left Atrial Function in Patients with Coronary Artery Disease: Strain Rate Imaging vs Tissue Velocity Imaging

Objective To evaluate the left atrial(LA) local function in patients with coronary artery disease(CAD) using strain rate imaging(SRI) and tissue velocity imaging(TVI).Methods LA lateral and septal strain rate,velocity,LA internal diameter,the peak flow velocities during early diastole(E),late diastole(A),E/A ratio were determined in 20 normal subjects and 14 patients with CAD and without left atrial dilatation using SRI,TVI and traditional echocardiography.The results were compared.Results Compared with the control group,LA internal diameter,mitral valve flow pattern,and TVI had no significant differences.LA lateral and septal strain rates were significant differrent between CAD group and the control group(P<0.05).Conclusions LA local dysfunction is able to be detected with strain rate imaging in patients without cardiac diastolic function involvement on echocardiography.