完全性左束支传导阻滞患者左心室心肌收缩功能的研究

Completeness left a conduction block of patients with left ventricular myocardial systolic function of research

目的应用超声二维斑点追踪显像技术探讨完全性左束支传导阻滞患者左室心内膜下心肌收缩功能。方法完全性左束支传导阻滞患者(CLBBB)20例,正常对照者20例,采用心尖长轴四腔心和二腔观的二维灰阶动态图像,应用二维应变软件测量左室壁各节段的心内膜下心肌收缩应变、应变率及整体长轴应变(GLS),心尖双平面Simpson法测量左室射血分数(LVEF﹑FS%)。结果与正常组比较,LBBB组,的左房内径、E/A、左室长轴心内膜下心肌的纵向收缩期峰值应变、应变率减低(P<0.05)。结论超声二维斑点追踪显像技术能准确地评价左束支患者的左室心内膜下心肌收缩功能。

Objective To use ultrasound 2 d spots tracking imaging techniques discussed completeness of left a conduction block patients subendocardial myocardial left ventricular systolic function. Methods Com- pleteness left a conduction block of patients （CLBBB） 20 cases, normal controls were 20 patients, the long axis XinJian four cavity heart and two views of the cavity 2 d gray-scale dynamic image, the application of two-di- mensional strain software measure left ventricular wall each segment subendoeardial myocardial shrinkage strain, strain rate and overall long axis strain （ GLS）, XinJian double plane Simpson method for measuring the left ven- tricular ejection fraction （LVEF, FS % ）. Results Compared with normal group, LBBB group, left room in- side, E/A, left for beneath the longitudinal axis of systolic heart failure strain, strain rate reduce （P 〈 0.05） Conclusion ultrasound 2 d spots tracking imaging techniques can accurately evaluate left bunch of a patient＇s left ventricular subendocardial myocardial systolic function.