应变率成像技术评价陈旧性心肌梗死患者左心房收缩功能

目的探讨应变率成像技术评价陈旧性心肌梗死患者左心房收缩功能改变的价值。方法对30例陈旧性心肌梗死患者(心梗组)和25例正常人(对照组),以应变率成像技术测量左心房侧壁,评价房间隔心肌收缩功能,应用Simpson’s方法测量左心房主动射血容积指数(LAAEVI)和被动射血容积指数(LAPEVI)。结果陈旧性心肌梗死患者左心房心肌应变率在心室收缩期和舒张早期减低,舒张晚期增高(P<0.05);左心房被动射血容积指数减少、主动射血容积指数增加(P<0.05)。左心房侧壁及房间隔应变率成像与主动射血分数检测存在良好的相关性(r=0.73,P<0.001;r=0.68,P<0.001)。结论应变率成像可以准确评价陈旧性心肌梗死患者左心房功能。

Ultrasound evaluation of left atrial function in patients with old myocardial infarction using strain rate imaging

Objective To evaluate the changes of the left atrial function in patients with old myocardial infarction (OMI) using strain rate imaging (SRI). Methods The systolic function of the left atrial lateral wall and atrial septum were measured by SRI in 30 patients with OMI. LAPEVI and LAAEVI were measured using Simpson method. Results Compared with the control group (25 normal subjects),the velocity of the left atrium reduced obviously in ventricular systole and early ventricular diastole in patients with OMI (P<0.05),but increased in late ventricular diastole (P<0.05),while LAAEVI increased significantly,but LAPEVI decreased significantly in patients with OMI (P<0.05). The SRI of the left atrial lateral wall and atrial septum correlated well with the LAAEVI (r=0.73,P<0.001; r=0.68,P<0.001). Conclusion SRI can be used to evaluate the left atrial function accurately in patiens with OMI.