【Abstract】 Objective: To assess the effects of delayed percutaneous transluminal coronary angioplasty (PTCA) on left ventricular motion and function evaluated by two dimensional echocardiography (2 DE) Methods: Fifty four patients with acute myocardial infarction were divided into delayed PTCA group and control group Left ventricular ejection fraction (LVEF) was determined by Simpson biplane formula and left ventricular wall motion abnormality scores were also measured 2 DE was performed after 2 to 3 weeks and 8 months of onset of acute myocardial in farction (AMI), respectively Results: The results showed that ventricular wall motion abnormality scores and LVEF in delayed PTCA group in acute phases were the same as in control group But the incidences of left ventricular dialatation and aneurysms in control group were higher than those of in delayed PTCA group ( p <0 05) After 8 4±1 9 months follow up, LVEF and ventricular wall motion in delayed PTCA group were better improved than those of in control group ( p <0 05) Conclusion: Our data suggested that active percutaneous transluminal coronary angioplasty therapy after AMI can significantly improve left ventricular function and wall motion更多还原