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Background Objective pathogenesis of acute myocardial infarction is coronary atherosclerosis(coronary arteries are also other diseases such as inflammation,spasms,deformity,etc) caused by continuous vessel lumen stenos-is,occlusion and myocardial blood supply to a serious shortage of collateral circulation while not fully establishment,but after percutaneous coronary intervention (PCI) in patients with postoperative recurrence in the pathogenesis of acute myocardial infarction is not clear,resulting in nursing health guidance on the existence of such patients omissions.This summary by observing recurrence after PCI in patients with acute myocardial infarction when implementing PCI lesion characteristics,to explore its possible pathogenesis of coronary heart disease to guide clinical care and rehabilitation guidance.