Quantitative assessment of myocardial regional function of different coronary atherosclerosis severity using velocity vector imaging
10.3760/cma.j.issn.1004-4477.2009.01.001
- VernacularTitle:速度向量成像定量评价不同程度缺血心肌局部功能的研究
- Author:
Xiaoling LIU
;
Mei ZHANG
;
Yun ZHANG
;
Zhiyun WANG
;
Guihua JIANG
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Ventricular function,left;
Myocardial ischemia;
Velocity vector imaging
- From:
Chinese Journal of Ultrasonography
2009;18(1):1-3
- CountryChina
- Language:Chinese
-
Abstract:
Objective To assess isehemic myocardial regional function of different coronary atherosclerosis using velocity vector imaging(VVI).Methods Two-dimensional images of apical four-，two-chamber and long-axis view were obtained in 50 patients with coronary artery disease.All segments of the left ventricle were divided into 5 groups：group 0 with no coronary artery stenosis，group 1 with stenosis＜50%，group 2 with stenosis 50%to 74%，group 3 with stenosis 75%to 99%and group 4 with a completely occluded coronary artery.The segmental myocardial systolic peak strain(ε)，systolic strain rate(SRs)，early diastolic strain rate(SRe)，late diastolic strain rate(SRa)and their ratio(SRe/SRa)were analyzed with VVI offline software.Results①Compared with group 0，SRe and SRe/SRa of group 1，SRs，SRe，SRe/SRa of group 2～4，εof group 2 and group 4 decreased significantly(P＜0.05).②In the comparison of four ischemic groups，ε，SRe，SRa of group 3 were markedly higher than those of group 2，while ε，SRs，SRa of group 2 were lower than those of group 1(P＜0.05)；for group 4，ε，SRs，SRe were lower than those of group 1，SRe was lower than that of group 2，and ε，SRs，SRe were lower than those of group 3(P＜0.05).ConclusionsIn the process of coronary atherosclerosis，myocardial diastolic and systolic dysfunction occurred early and orderly，and has a bidirectional change：decreased firstly，then increased and decreased at last.
