Evaluation of intraventricular dyssynchrony in patients with coronary artery disease by two dimensional strain imaging
10.3760/cma.j.issn.1004-4477.2009.04.003
- VernacularTitle:超声斑点追踪二维应变对冠心病患者左心室同步性的研究
- Author:
Yuhan WU
;
Youbin DENG
;
Runqing HUANG
;
Xiaojun BI
;
Rong LIU
;
Ceyao ZHAO
;
Ying ZHU
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Coronary disease;
Ventricular function,left;
Two-dimensional strain
- From:
Chinese Journal of Ultrasonography
2009;18(4):281-283
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the dyssynchrony of left ventricle in patients with coronary artery disease(CAD) by two-dimensional strain echocardiography (2-DS). Methods The myocardium of left ventricle of 33 patients with CAD and 30 nomal controls were detected by 2-DS. The time from onset QRS complexes to peak systolic longitudinal strain(Ts) and the standard deviation of Ts of 18 left ventricular segments (Ts-SD)were measured. Results There were 168 segments whose flow was provided by coronary artery with stenosis≤75% ,210 segments whose flow was provided by coronary artery with stenosis 75 %. ①Ts was delayed significantly and Ts-SD was obviously higher in patients with stenosis≥75% when compared with the control group. ②Ts was delayed and Ts-SD was higher in patients with stenosis≥75% compared with those whose stenosis was ≤75%. ③There were no statistical differences in Ts and Ts-SD between the patients with stenosis ≤75% and the control group. ④When left ventricular systolic dyssynchrony was defined as Ts-SD≥33.0 ms, there were 22 patients with systolic dyssynchrony of all 26 patients whose coronary artery stenosis≥75%, there were no patient with systolic dyssynchrony of all 7 patients whose stenosis ≤75%. Conclusions Although there are no evident regional wall motion abnormalities by routine echocardiography,in patients with severe coronary artery stenosis,2-DS can detect exactly the dyssynchrony of left ventricle.
