本文研究运动引起的室上性早搏和早搏前窦性心动 ST 段压低的幅度以及两者之差与冠状动脉疾病(CAD)的存在和严重程度之间的关系。病人和方法 2200例可能有或肯定为 CAD 的病人行平板运动试验,其中486例(22.1%)于运动试验期间有室上性早搏,该486例中133例(27.4%)行左室造影和冠状动脉造影。133例中男性101例,女性32例,年龄30～67岁(平均53.6±7.9)。将其分为两组,A 组96例(72%)有明显 CAD,B 组37例(28%)无 CAD。A 组再分为 A_1组34例,有心肌梗塞史;A_2组62例,无心肌梗塞史。测量每例病人运动引起的室上性早搏的 ST 段(ST_x)和早 This article investigates the relationship between exercise-induced premature supraventricular premature beats and the amplitude of ST segment depression before premature beats and the relationship between the difference and the presence and severity of coronary artery disease (CAD). PATIENTS AND METHODS: Totally 2200 patients (22.1%) had premature ventricular contractions during exercise test in 2200 patients who may or certainly were CAD. Of the 486 patients, 133 (27.4%) had left ventricular angiography and Coronary angiography. Of the 133 patients, 101 were male and 32 were female, ranging in age from 30 to 67 years (mean, 53.6 ± 7.9). Divided into two groups, 96 cases (72%) of group A had obvious CAD, and 37 cases (28%) of group B had no CAD. A group was divided into A_1 group of 34 cases, a history of myocardial infarction; A_2 group of 62 cases, no history of myocardial infarction. The ST-segment (ST_x) and morning of supraventricular premature beats were measured for each patient’s motion