超声检测心内外膜下跨壁速度梯度在心肌缺血诊断中的应用

目的：探讨跨壁速度梯度（MVG）在诊断心肌缺血中的应用价值。方法：检测38例冠心病患者（病例组）和28例健康志愿者（对照组）心尖四腔观、两腔观各节段心肌收缩期跨壁速度梯度（MVG-L＋）、舒张期跨壁速度梯度（MVG—L-）。结果：对照组MVG—L＋和MVG—L-由基底段、中间段至心尖段差异无显著性意义。病例组缺血节段的MVG-L＋和MVG—L-较对照组相应节段明显降低。结论：MVG可定量评价局部心肌运动状态，为临床心功能评价提供有效指标。

Application of myocardial velocity gradient in diagnosis of myocardial ischemia

Objective:To investigate the value of myocardial velocity gradient(MVG) in diagnosis of myocardial ischemia.Methods:Thirty-eight patients with coronary artery disease and twenty-eight healthy volunteers were enrolled in this study,MVG-L in systolic stage and MVG-L-in diastolic stage were measured from apical four chamber and two chamber view.Results:In normal group,MVG-L and MVG-L-was slightly different among basal,middle and apical segments of left ventricular wall,which was no statistical difference.Compared with normal group,MVG-L and MVG-L-measured from myocardial ischemia group significantly decreased.Conclusion:MVG can quantitatively analyze the motional state of regional myocardium,alternatively providing an effective index of evaluating cardiac function in coronary artery disease.