Methods: Durang Dob was infused, the 2DE images and the blood flow of aorta valve and mitral valve were recorded.

• 方法：多巴酚丁胺（Dob）连续静脉注射的同时，应用二维超声心动图（2DE）及脉冲多普勒超声心动图 PDE）观察MI区域内室壁运动有无改善及主动脉瓣口、二尖瓣口血流动力学指标。