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心肌梗死是临床中的一种常见病，对患者的健康产生严重的影响。以前以心电图ST段抬高、异常Q波及T波的典型改变，作为诊断急性心肌梗死主要依据，忽视了非ST段抬高急性心肌梗死的诊断，造成这部分非ST段抬高急性心肌梗死误诊、漏诊。随着对非ST段抬高急性心肌梗死的认识，误诊、漏诊明显减少。使这部分患者得到及时诊断及规范治疗，减少了心脏性猝死。本文简要介绍非ST段抬高急性心肌梗死的临床表现、诊断及治疗等。“,”Myocardial infarction is one of the clinical common disease,having serious impact on the health of patients.In ECG ST segment elevation, abnormal Q spread before typical changes of T wave, as the main basis for diagnosis of acute myocardial infarction, ignored the diagnosis of the non ST-elevation acute myocardial infarction.This part of the non ST-elevation acute myocardial infarction, misdiagnosis and missed diagnosis.As the understanding of non ST-elevation acute myocardial infarction, dramatically reduce misdiagnosis and missed diagnosis.It makes this part of the patients receive timely diagnosis and standard treatment, and reduces the sudden cardiac death.In this text, the clinical manifestation, diagnosis and treatment of non ST-elevation acute myocardial infarction are briefly introduced.