实时三平面组织同步显像评价正常人左心室内心肌收缩的同步性

目的应用实时三平面组织同步显像(TSI)技术评价正常人左心室内心肌收缩的同步性。方法应用实时三平面TSI技术同步采集20例健康志愿者心尖4腔观、2腔观及左室长轴观图像,脱机后进行后处理分析:(1)创建TSI彩色编码表示的左心室表面模型半定量反映心肌节段达峰时间(TTP);(2)定量测量3个心尖切面观左心室6个基底段和6个中间段TTP,并将各测值进行比较。结果 (1)TSI表面模型显示左心室各心肌节段彩色编码多为均匀一致的绿色,少数心尖段为黄色或红色。(2)左心室各心肌节段TTP差异均无显著性意义(均P>0.05)。结论正常人左心室内心肌收缩具有同步性;TSI技术可对心肌收缩的同步性作直观、定量地评价。

Assessment of intraventricular mechanical synchrony in systole by tissue synchronization imaging in normal subjects

Objective To evaluate intraventricular mechanical synchrony in systole by real-time tri-plane tissue synchronization imaging(TSI).Methods Real-time tri-plane TSI was performed in 20 normal subjects,and the apical 4-chamber,2-chamber and long-axis views of the left ventricular(LV) were obtained simultaneously.The data were post-processed offline,and a TSI surface map of LV colorized according to the time-to-positive peak systolic velocity(TTP) was generated to reflect the segment TTP semi-quantitatively.The ...