目的 探讨40岁以下冠心病患者危险因素、冠状动脉造影特点。方法 选取经临床或冠状动脉造影确诊为冠心病的患 者182例为冠心病组，同期收治的冠状动脉造影正常的非冠心病患者148例为对照组，回顾分析两组间冠心病危险因 素及冠状动脉造影特点。结果 在大量吸烟、糖尿病、高胆固醇、高水平的低密度脂蛋白及低水平的高密度脂蛋白 这几个因素间，冠心病组与对照组相比差异有显著性(P均＜0.05)。在冠心病组，冠状动脉单支病变占55％，冠脉 轻度狭窄甚至完全无异常者占30％。结论 对于40岁以下的冠心病患者，吸烟是首要的危险因素，冠状动脉造影以 单支病变最多见。

Objective In order to research the risk factors and angiographic features of coronary heart disease in the patients below 40 years old. Methods 182 patients with coronary heart disease were diagnosed by clinical and coronary angiography as coronary heart disease group, meanwhile 148 patients with normal coronary arteriesangiograms as control group, retrospective analysis the risk factors and angiographic features between the two groups. Results There is a difference between the two groups in the heavy smoking、diabetes、high cholesterol、high-level low density lipoprote and low-level high density lipoprote(P<0.05). In the coronary heart disease group, the single coronary artery disease accounted for 55%, while slight coronary stenosis or completely normal persons accounted for 30%. Conclusion Smoking is the most important risk factor and single vessel lesion is the most common vascular lesion for coronary heart disease patients under 40 years of age,