Quantitative assessment of myocardial segmental systolic function in patients with coronary disease by velocity vector imaging
- VernacularTitle:速度向量成像定量评估冠心病心肌节段收缩功能的研究
- Author:
Zurong YANG
;
Qichang ZHOU
;
Leiqi TIAN
;
Shi ZENG
;
Yi TAN
;
Danming CAO
;
Ling LI
;
Darong PU
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Coronary disease;
Ventricular function,left;
Veloctiy vector imaging
- From:
Chinese Journal of Ultrasonography
2008;17(9):749-752
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the clinical significance of velocity vector imaging(VVI)in evaluating the left ventricular(LV)segmental longitudinal systolic function in patients with coronary artery disease(CAD).Methods In 25 patients with myocardial ischemia,28 patients with myocardial infarction,26 patients with coronary lumen stenosis＜50%,according to coronary arteriography and electrocardiogram,the myocardial segments of LV were divided into 4 groups:ischemic segments group,infarcted segments group,non-ischemic segments group and normal segments group.Twenty-eight healthy subjects were selected as control group.Dynamic imaging of all subjects were collected,the systolic peak strain(Smax)and strain rate(SRmax),the time to peak strain(PTs)and the time to peak strain rate(PTsr)were measured respectively.Results Smax and SRmax of the ischemic segments and infracted segments were significantly lower than those of the control group respectively,PTs and PTsr of the ischemic segments and infracted segments were significantly longer than those of the control group respectively.Smax and SRmax of infarcted segments were significantly lower than those of the ischemic segments,there were no differences of PTs and PTsr between ischemic segments and infracted segments.Smax and SRmax cutoff of -14.08%,-0.83 s-1 for detecting ischemic segments and cutoff of -6.65%,-0.38 s-1 for detecting infracted segments,respectively,gave an optimal sensitivity and specificity.Conclusions VVI is a kind of novel noninvasive-tool to quantitatively assess LV regional systolic function in CAD patients.It is competent to differentiate between the ischemic segments and infarcted segments.
