超声心动图评价心肌梗死后的右心室功能

目的研究急性心肌梗死(AMI)后右心室功能,共40例.方法在二维切面心尖四腔图上用脉冲多普勒组织成像技术(PW-DTI),在右室游离壁测量三尖瓣环的运动,同时用M型曲线记录三尖瓣环运动.结果下壁、前壁心肌梗死(MI)后三尖瓣环收缩期峰值速度与对照组相比下降(12.0 vs 16.3 cm/s,P＜0.01;14.5 vs 16.3cm/s,P＜0.05).下壁MI后三尖瓣环运动幅度比对照组下降(19.4 vs 24 mm,P＜0.01).下壁合并右心室梗死者三尖瓣环峰值速度下降(P＜0.01),舒张早期速度下降(P＜0.01或P＜0.05),三尖瓣环运动幅度下降(P＜0.01).结论分析三尖瓣环运动和速度可评价下壁心肌梗死后的右心室功能.

Assessment of Right Ventricular Function by Echocardiography in Patients with Acute Myocardial Infarction

Objective: To assess the right ventricular function by echocardiography in patients with acute myocardial infarction (AMI). Methods: From the echocardiography apical four-chamber views, the motion of tricuspid annulus was recorded at the right ventricular free wall with pulsed wave Doppler tissue imaging (PW-DTI) and two-dimensional guided M-mode recordings. Results: Compared with control group, the peak systolic velocity of tricuspid annulus was significantly reduced in inferior and anterior MI (12.0 vs 16.3 cm/s, P<0.01;14.5 vs 16.3 cm/s,P<0.05);the tricuspid annular motion was reduced in inferior MI (19.4 vs 24.0 cm/s,P<0.01). Patients with right ventricular infarction had a significantly decreased peak systolic tricuspid annular velocity (P<0.01) and peak early diastolic velocity (P<0.01). The tricuspid annular range reduced (P<0.01). Conclusion: Tricuspid annular motion and velocity can be used to assess the right ventricular function after inferior MI.