Ischemia resulted in a significantly rapid reduction of systolic and early diastolic velocities. Such reduction were detected by DTI after 5 s of coronary artery occlusion,but after 1 min by conventional two dimensional echocardiography.

• 缺血导致局部心室壁运动明显减弱 ,脉冲频谱DTI技术于冠脉闭塞后5s可检出这种异常 ,而传统超声指标在闭塞 1min后才出现显著性差异。