二维应变超声在冠心病患者左心室扭转中的应用

Two-dimensional strain echocardiography in evaluating left ventricular twist in patients with coronary heart disease

关键词:  超声心动图描记术  二维应变  冠心病  心室功能

Key words:  echocardiography  two-dimensional strain  coronary heart disease  ventricular function

摘要:

［目的］探讨应用二维应变超声心动图（2DSE）评价冠心病（CHD）患者的左心室旋转和扭转运动的临床价值。［方法］应用GE Vivid 7 Dimension 超声心动图仪采集35例冠心病患者（冠心病组）及30例正常人（对照组）左心室短轴二尖瓣环及心尖水平切面的二维灰阶图像，计算左心室心尖部和心底部的旋转角度及旋转率、左心室整体扭转角度及整体扭转率。［结果］对照组中左心室心尖部呈逆时针旋转，心底部呈顺时针旋转，整体呈逆时针旋转，且均于收缩期末达峰值；与正常对照组比较，CHD组的整体扭转率的组间差异有显著性意义（P<0.05）。［结论］二维应变超声心动图能够定量测量左心室旋转和扭转运动，为评价冠心病患者左心室功能提供一种新方法。

Abstract:

［Objective］To evaluate the left ventricular(LV) rotation and twist in patients with coronary heart disease (CHD) using two-dimensional strain echocardiography (2DSE).［Methods］Thirty-five patients with CHD and 30 healthy volunteers as control group were enrolled in the study.The two-dimensional images from LV short-axis views at the levels of mitral annulus and apex were obtained from GE Vivid 7 Dimension echocardiography.LV peak rotation and rotation rate of mitral annulus and apex were recorded at both views.LV twist was defined as apical rotation relative to the base.［Results］As seen from the apex,the normal LV performed a wringing motion with a clockwise rotation at the base and counterclockwise rotation at the apex.Compared to the control group,global torsion rate was lower in CHD(P<0.05).［Conclusion］2DSE can measure the LV rotation and twist non-invasively,providing a new way for evaluating the LV function in patients with CHD.