A组为48±11岁的212(男175、女37)例非志愿者,无心脏病的临床表现,静息心电图正常,活动平板试验无胸痛。B组51±11岁的31(男16,女15)例冠脉造影未见异常者,其中2例既往Q波型心梗,3例左室肥厚。C组为62±10岁的153例稳定型心绞痛患者,其中13例既往Q波型心梗,13例左室肥厚。D组 Group A was a non-volunteer population of 212 (175 males, 37 females) aged 48 ± 11 years with no clinical manifestations of heart disease, normal rest electrocardiogram, and no chest pain in the active treadmill test. There were no abnormalities in coronary angiography at 51 ± 11 years old in group B (31 men, 16 women and 15 women) in group B, including 2 cases of previous Q wave myocardial infarction and 3 cases of left ventricular hypertrophy. Group C was 153 patients with stable angina at 62 ± 10 years old, of whom 13 had previous Q wave MI and 13 had left ventricular hypertrophy. Group D