Value of Duration of Myocardial Early Systolic Lengthening Assessed by Echocardiogram on Defining the Degree of Coronary Artery Stenosis
10.3969/j.issn.1000-3614.2019.10.007
- VernacularTitle:超声心动图心肌收缩早期延迟时间指标对判断冠状动脉狭窄程度的价值
- Author:
Qian HU
1
;
Jia LIU
;
Qingxiong YUE
Author Information
1. 大连医科大学附属大连市中心医院 超声诊断科
- Keywords:
speckle tracking imaging;
duration of myocardial early systolic lengthening;
longitudinal strain;
radial strain;
circumferential strain;
coronary artery disease
- From:
Chinese Circulation Journal
2019;34(10):974-978
- CountryChina
- Language:Chinese
-
Abstract:
Objectives: To evaluate the degree of coronary artery stenosis with duration of myocardial early systolic lengthening derived from 2D speckle tracking imaging (2D-STD in patients with coronary artery disease (CAD). Methods: 185 patients with suspected CAD underwent 2D-STI before coronary CT angiography (CCTA) were included in this study. Duration of myocardial early systolic lengthening, LS, RS, and CS were measured by 2D-STI. According to the results of CCTA, the myocardial segment were divided into normal group (without coronary artery stenosis), mild stenosis group(coronary artery stenosis<50%), moderate stenosis group (50%>coronary artery stenosis < 70%) and severe stenosis group (70%>coronary artery stenosis <100%). Results: Duration of myocardial early systolic lengthening, LS, RS and CS were similar between mild stenosis group and normal group (P>0.05). Duration of myocardial early systolic lengthening was increased, and LS was decreased in moderate stenosis group than in normal group (P<0.05). Duration of myocardial early systolic lengthening was increased, LS, RS and CS were significantly decreased in severe stenosis group than in normal group (P<0.01). The cutoff value of early systolic lengthening for diagnose severe stenosis was 60.0 ms (area under ROC curve [AUCl=0.91, P<0.01), with the sensitivity 85.5% and specificity 74.1%, respectively. Conclusions: Duration of myocardial early systolic lengthening is prolonged in patients with significant CAD (moderate and severe stenosis), and might be used a useful parameter to identify patients with significant CAD (moderate and severe stenosis).
