Evaluation of left ventricular dyssynchrony with two-dimensional speckle tracking echocardiography in acute myocardial infarction
10.3321/j.issn:1003-3289.2009.10.019
- VernacularTitle:二维斑点追踪成像评价急性心肌梗死后左心室收缩同步性
- Author:
Chunyan MA
;
Xiuyun LI
;
Weidong REN
;
Shuang LIU
;
Shijie ZHAO
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Myocardial infarction;
Left ventricular systolic synchrony;
Myocardial infarction size
- From:
Chinese Journal of Medical Imaging Technology
2009;25(10):1800-1802
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the left ventricular (LV) systolic dyssynchrony after the acute myocardial infarction (AMI) with two-dimensional speckle tracking echocardiography (STE). Methods STE were performed in 65 patients within 72 h of AMI and compared with 60 age- and sex-matched healthy volunteers. The peak longitudinal strain (LS_(peak)) was measured at LV myocardium. LV dyssynchrony was defined as an interval ≥130 ms for the absolute difference in time to peak radial strain for the anteroseptal wall versus the posterior wall (TAS-POST). Size of myocardial infarction (MIS)was confirmed by wall-motion score index (WMSI). Results The LS_(peak) and LV ejection fraction (LVEF) were lower, and WMSI and TAS-POST were larger in AMI patients compared with controls. Forty-two patients had developed LV dyssynchrony (64.62%), and there were strong correlation between LV dyssynchrony (TAS-POST) and LS_(peak), LVEF, and WMSI (MIS). MIS was the most independent predictor for systolic dyssynchrony. Conclusion AMI with normal QRS can induce LV dyssynchrony, which is mainly determined by MIS. STE is a reliable technique for accurate evaluation of LV synchrony.
