摘要
目的应用组织追踪（TT）技术测定二尖瓣瓣环下移距离，以评价该技术在左室收缩功能中的作用。方法共50例，36例EF〉55％为健康对照组，14例EF〈55％为左室收缩功能降低组。左室射血分数用二维超声心动图Simpson＇s法测定。用M型超声心动图法（M-型法）和TT法在心尖二腔切面，心尖长轴切面和心尖四腔切面的6个不同位置测定收缩期二尖瓣环向心尖下移的运动距离。结果TT法和M型法测定的收缩期二尖瓣瓣环位移，其相关性良好（r=0．7～0．92，P〈0．01）；而且与射血分数也具有良好相关（r分别0．625和0．497，P〈0．01）；EF〈55％组的二尖瓣瓣环下移距离明显小于EF〉55％组（P〈0．01）。结论TT法测定二尖瓣瓣环位移可作为一种简单、快速和无创性评价左室收缩功能的新方法。
Objective To evaluate the ability of tissue tracking in assessment of left ventricular systolic function through determination of the systolic mitral annular displacement （MAD） . Methods We studied 36 subjects with normal I.V function and 14 patients with LV ejection fraction （LVEF） 〈55%. LVEF of all hatients were determined by 2D echocardiography using Simpson＇ s rule. The systolic MAD was determined by tissue tracking and M mode echocardiography. The apical four chamber, two-chamber and LV apical long axis view were used to determine the MAD of 6 sites. Results In all patients,mean MAD measured by tissue tracking from 6 sites of the mitral anulus correlated closely with MAD determined by M-mode （r= 0.7-0.92, P〈0.01） and the LV ejection fraction determined by 2D echocardiography （r= 0. 625, P〈0.01）, but it had a significant reduced systolic MAD at patients with LV ejection fraction〈55% when compared with subjects demonstrating normal LV function （P〈0.01） .Conclusions MAD determined by tissue tracking provides a simple, rapid and noninvasive tool for assess ment of global LV systolic funtion.
出处
《中国超声诊断杂志》
2006年第1期9-10,共2页
Chinese Journal of Ultrasound Diagnosis
关键词
组织追踪法
左室功能
二尖瓣瓣环位移
收缩
Tissue Tracking, Left ventricular function, Mitral annulus displacement, Aystole
