多普勒组织成像检测冠心病室壁运动及心肌活性的应用价值

本文报道了应用多普勒组织成像（ＤＴＩ）检测冠心病室壁运动异常，并配合小剂量多巴酚丁胺负荷超声心动图判断心肌活性。结果显示：冠心病室壁运动异常节段的收缩期，舒张期速度均低于正常组（Ｐ＜０．０５）。应用小剂量多巴酚丁胺后，１００个异常节段中，３５个节段运动改善（心肌存活组，Ａ组），６５个节段无明显变化（坏死心肌组，Ｂ组）；ＤＴＩ检测Ａ组的收缩期速度Ｖｓ与速度增长率ＶＲ均明显高于Ｂ组。表明ＤＴＩ对心肌缺血及缺血心肌活性的判断有一定价值

The Value of Doppler Tissue Imaging in Detecting of Left Ventricular Wall Motion and Myocardial Viability in Coronary Artery Disease

The method of Doppler tissue imaging(DTI)was performed in 20 patients with coronary artery disease with purpose to detect the velocity of left ventricular wall motion under low dose dobutamine test.The ischemic myocardial viability was assessed.It showed that the velocity of the asynergic segment was significantly lower than normal subject(P<0 05).Among the 100 asynergic segments,35 segments improved after dobutamine infusion in Group A,no significant changes were observed in Group B.The values of Vs and VR in Group A were significantly higher than that of Group B.This study indicated that DTI is of value for assessment of myocardial ischemia and the viable ischmic myocarium.