Objective To observe the therapeutic efficacy of percutaneous transluminal coronary antioplasty(PTCA) in treating acute myocardial infarction and chronic coronary artery occlusion.

• 目的观察急性心肌梗死和慢性冠状动脉闭塞经皮冠状动脉内成形术(PTCA)的治疗效果。