本文报告心肌梗塞311例的临床分析。男性较女性明显多见。其中82%有心脑血管病及糖尿病史。梗塞前综合征、合并症及死亡率均以61岁以上者较多见。不典型的心肌梗塞28.2%在61岁以上组明显多见,其症状多为胸闷、呼吸困难、上腹堵闷、呕吐、大汗、休克及晕厥等。对发生不典型心肌梗塞的机制进行了讨论。 This article reports the clinical analysis of 311 cases of myocardial infarction. Men are obviously more common than women. 82% of them have cardiovascular and diabetes history. Pre-infarction syndrome, comorbidity and mortality were more common in people over 61 years of age. 28.2% of atypical myocardial infarction was significantly more common in patients over 61 years old. Most of the symptoms were chest tightness, dyspnea, abdominal blockage, vomiting, sweating, shock and fainting. The mechanism of atypical myocardial infarction was discussed.