<正>急性心肌梗死(acute myocardial infarction,AMI)是心血管系统疾病中急危重症,临床起病急、病情变化快、致死率高。近年来经皮穿刺冠状动脉腔内血管成型术(percutaneous coronary intervention,PCI)在AMI的治疗中广泛应用,降