Objective:To explore feature of clinic and coronary angiography (CAG)of acute myocardial infarction (AMI)for young adults less than 30 years old.Methods:A total of 41 AMI patients,who were under 30 years old and hospitalzed in our hospital from 2004 to 2012,were enrolled as young group.Another 360 AMI patients >50 years were randomly selected as middle-aged group during the same time.Clinical features and CAG results were compared between two groups.Results:Compared with middle-aged group,there were significant rise in percenta-ges of male (68.1% vs.97.6%),smokers (50.6% vs.80.5%)and hypercholesterolemia (59.2% vs.65.9%)and body mass index [(22.3±6.6)kg/m2 vs.(26.3±9.6)kg/m2 ],and significant reduction in percentages of hyper-tension (63.1% vs.24.4%)and diabetes mellitus (30.6% vs.4.9%)in young group,P<0.05 or <0.01;for ex-citing cause,percentages of psychological factors such as tension and anxiety (29.3% vs.3.6%),staying up late (39.0% vs.2.8%)and heavy drinking (14.6% vs.4.7%)in young group were significantly higher than those of middle-aged group,while percentages of agitation (8.3% vs.0)in middle-aged group was significantly higher than that of young group (P<0.05 or <0.01).For CAG results,young group was mainly single vessel coronary disease (56.1%),which were mainly type A (53.7%)and type B1 (29.3%)lesions,while middle-aged group was mainly multi-vessel coronary disease (48.1%),which were mainly type B2 (29.7%)and type C (33.9%)lesions,and there were significant difference between two groups (P<0.05 or <0.01).Conclusion:Smoking,obesity and hy-perlipidemia are the most important risk factors for acute myocardial infarction;the major exciting causes are sta-ying up late,alcohol drinking and high mental stress etc.in young AMI patients;their coronary lesions are mainly single vessel coronary disease,and of type A and type B1 .%目的：探讨小于30岁青年急性心肌梗死（AMI）患者的临床及冠状动脉造影特点。方法：选择我院2004年至2012年收治的小于30岁 AMI患者41例为青年组，随机选择同期大于50岁 AMI患者360例为中老年组，比较两组患者的临床特征及冠脉造影结果。结果：与中老年组比较，青年组男性（68.1％比97.6％），吸烟（50.6％比80.5％）、高胆固醇血症（59.2％比65.9％）比例及人体质量指数[（22.3±6.6）kg/m2比（26.3±9.6）kg/m2]明显升高；高血压（63.1％比24.4％）、糖尿病（30.6％比4.9％）比例明显较低（P＜0.05或＜0.01）；发病诱因中，青年组紧张、焦虑等心理因素（29.3％比3.6％）和熬夜（39.0％比2.8％）、大量饮酒（14.6％比4.7％）比例显著高于中老年组，而中老年组情绪激动（8.3％比0），比例显著高于青年组（P＜0.05或＜0.01）。青年组冠脉造影结果以单支病变为主（56.1％），且多为 A （53.7％）、B1型（29.3％）病变，中老年组以多支病变为主（48.1％），且多为B2（29.7％）、C型（33.9％）病变（P＜0.05或＜0.01）。结论：吸烟、肥胖、高脂血症是小于30岁青年急性心肌梗死患者最重要危险因素；熬夜、饮酒和心理压力大等为青年 AMI患者主要诱因；冠脉病变以单支病变、A、B1型简单病变为主。
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