心肌组织多普勒显像技术在心血管疾病中的应用

目的：通过正常组与疾病组室壁运动速度的对比分析，以验证该技术的准确性，为定量评价局部室壁运动提供新方法。方法：分别对２８例正常组与１５例陈旧性前间壁心肌梗塞组、２０例扩张型心肌病组（ＤＣＭ）前间隔及左室后壁运动速度进行测量，并同时将二维图像作对比分析。结果：陈旧性心肌梗塞组室间隔收缩期峰值速度明显低于正常对照组Ｐ＜０．００１；ＤＣＭ组前间隔与后壁收缩期峰值速度明显低于正常对照组Ｐ＜０．００１。２ＤＥ－ＴＤＩ显像中，正常组收缩中期前间隔与左室后壁以明亮的蓝色及红黄色编码，疾病组彩色编码暗淡或消失。结论：ＴＤＩ将Ｍ型与多普勒超声技术结合起来，不仅可以评价心脏整体功能，而且还能够对局部室壁的运动速度进行分析，是一有价值的显像技术，值得进一步研究。

Application of Myocardial Tissue Doppler Imaging in Cardiovascular Disease

Objective:To validate accuracy of tissue Doppler image (TDI)for evaluating cardial motion.Methods:TDI was used to inspect 28 normal subjects(G 1),15 patients with old anteroseptal myocardial infartion(G 2)and 20 patients with dilated cardiomyopathy(G 3).The mean velocity of IVS and posterior wall(PW)motion were all measured.Results:In G 1,peak velocity of the anteroseptal wall motion was lower than PW( P <0 001);in G 2,myocardial motion velocity of the infarct region was significantly lower than G 1( P <0 001);in G 3,myocardial motion velocity of anteroseptal and PW was lower than G 1( P <0 001).In case of 2 DE combining TDI (2 DE TDI),during mid systole.the anteroseptal wall was bright color code blue and the PW was bright red in G 1,while the anteroseptal wall was dark or colorless in G 2 and G 3 due to the reduced myocardial motion velocity.Conclusion:2 DE TDI has enormous potentialities for evaluating the globar and regional cardiac function.