摘要
Abstract
Objective To investigate the changes in left ventricular longitudinal strain and radial strain and strain rates in patients with aortic stenosis by velocity vector imaging (VVI).Methods Fifty-five aortic stenosis patients with normal left ventricular ejection fraction were divided into mild group (25 cases) and moderate-to-severe group (30 cases) according to the degree of aortic stenosis.Twenty-five healthy age-and sex-matched volunteers were selected as the control group.VVI was used to measure left ventricular global longitudinal peak systolic strain (GLPSS) and GLPSS rate (GLPSSr),as well as left ventricular global radial peak systolic strain (GRPSS) and GRPSS (GRPSSr).Results Compared with the control group,the mild group had significantly lower GLPSS and GLPSSr (F =42.52,23.88;P ＜0.01),while the moderate-to-severe group had significantly lower GLPSS,GLPSSr,GRPSS,and GRPSSr (F=4.25-42.52,P＜0.01).There was no significant difference in GRPSS and GRPSSr between the control group and the mild group (P＞0.05).Compared with the mild group,the moderate-to-severe group showed significant reductions in all the four parameters (F=4.25-42.52,P＜0.05).Conclusion The left ventricular GLPSS and GLPSSr decrease in the early stage of aortic stenosis,and GRPSS and GRPSSr decrease as the disease progress.关键词
主动脉瓣狭窄/心室功能,左/超声心动描记术/速度向量成像Key words
aortic valve stenosis/ventricular function, left/echocardiography/velocity vector imaging分类
临床医学
