应用二维斑点追踪技术评价正常人左室整体及节段收缩功能

目的:应用二维斑点追踪技术评价正常人左室整体及节段收缩功能。方法:随机入组36例健康志愿者,应用Qlab 9.0分析软件分析左室各壁段、各水平和左室整体纵向(longitudinal strain,LS)/环向(circumferential strain,CS)应变值。导出Excel表格,经计算后获得左室基底水平旋转(basal rotation,BR)值、心尖水平旋转(apical rotation,AR)值、左室扭转(left ventricular torsion,LVT)值。结果:正常人室间隔与下壁CS值高于前壁、侧壁(P0.008)。正常人基底水平LS值低于心尖水平与乳头肌水平(P0.017),心尖水平CS值高于基底水平及乳头肌水平(P0.01)。结论:室间隔处于心脏收缩的中心地位,下壁对室间隔及右室扭转及收缩有辅助作用,左室心肌收缩力自基底水平至心尖水平呈递增趋势。

Evaluation of left ventricular global and segmental systolic function using two dimensional speckle tracking echocardiography LI Zheng*, PAN Cui-zhen, SHU Xian-hong (*Department of echocardiography, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiology, Shanghai Institute of Medical Imaging, Shanghai 200032, China)