中文摘要：

目的探讨中青年急性心肌梗死（AMI）临床特点。方法分析中青年组（年龄〈60岁,143例）和老年组（年龄≥60岁,274例）AMI患者的既往疾病、实验室检查和冠状动脉（冠脉）造影资料以及主要不良心血管事件（MACE）的发生情况。结果 与老年组相比,中青年组患者中的男性和有吸烟史的比例较高,有高血压及梗死前心绞痛病史比例、WBC计数、血尿酸和额面QRS-T夹角值均较低（P〈0.05）。中青年组侧支循环形成者的比例低于老年组（7.7%vs.15.0%）（P〈0.05）,冠脉Gensini积分在3～38分者的比例高于老年组（48.3%vs.35.4%）（P〈0.05）。中青年组MACE发生率低于老年组（12.6%vs.23.7%）（P〈0.05）。结论 中青年AMI好发于男性和吸烟人群。根据实验室检查、额面QRS-T夹角值和冠脉Gensini积分,可以初步评估AMI患者病情。

英文摘要：

Objective To investigate the clinical characteristics of young and middle-aged patients with acute myocardial infarction （AMI）. Methods The characteristics were compared bwtween AMI patients aged 〈60 years old（group A, 143 cases） and those aged ≥60 years old（group B, 274 cases）, which included past medical history, laboratory examinations, coronary angiography, and major adverse cardiovascular events（MACE）. Results Compared with group B, the proportions of male and smoking were higher,and the proportions of high blood pressure and angina pectoris before infarction,WBC count, blood uric acid, frontal QRS-T angle value were lower in group A（P〈0. 05）. The percentage of the patients with collateral circulation formation was lower and the proportion of coronary Gensini scores of 3-38 points was higher in group A than those in group B（P〈0. 05）. The incidence of MACE was lower in group A than that in group B（P〈0. 05）. Conclusion Young and middle-aged patients with AMI were more common in male and smoker. The results of laboratory examination, frontal QRS-T angle calculation and Gensini scores may be taken for the primary evaluation of the illness condition of AMI patients.