原发性心肌梗塞的男性病人中发病前吸烟者较健康人中吸烟者比例高。这种差别随年令的增长而减少。心肌梗塞发病后戒烟的病人的病程经过比发病后继续吸烟的病人的病程经过一般较重。但戒烟者的非死亡复发率及心血管病死亡率仅继续吸烟者的一半。 Among the male patients with primary myocardial infarction, the incidence of smokers was higher than that of healthy smokers. This difference diminishes as the year grows. The course of smoking cessation after the onset of myocardial infarction was generally worse than that of patients who continued to smoke after the onset of the disease. However, the rate of non-death relapse and cardiovascular death among those who quit smoking is only half that of those who continue to smoke.