冠心病有许多临床表现,某些常作为危险的指针。在日常生活中发生的短暂性缺血,大多是无症状的,是危险的标志之一,动态心电图发现心肌缺血存在昼夜节律在早晨清醒与起床时发作明显增加。临床研究显示缺血发作存在35%～80%的慢性稳定冠心病,20%～55%不稳定性心绞痛,20%～40%梗塞后患者,16%具血管疾病者,3%～7%具危险因素但无症状的中年男性。许多因素可影响这些缺血的发生,动态监测发现在睡眠时心肌缺血发作明显减少,且发作持续时间更短,而重劳动时缺血发作大大增加,发作还呈现明显周期性,稳定性心绞痛者在午夜至早晨6时发作最少,当清醒后2～4小时发作明显增加,以后发 Coronary heart disease has many clinical manifestations, some often as a dangerous pointer. Transient ischemia occurred in daily life, mostly asymptomatic, is one of the signs of danger, dynamic electrocardiogram found myocardial ischemia there is a circadian rhythm in the morning wake up and wake up significantly increased seizures. Clinical studies have shown that there is 35% to 80% of chronic stable coronary heart disease, 20% to 55% of unstable angina pectoris, 20% to 40% of post-infarction patients, 16% of vascular diseases, 3% to 7% Middle-aged men who are risk factors but asymptomatic. Many factors can affect these ischemic events. Dynamic monitoring found a significant reduction of myocardial ischemic episodes during sleep, shorter episodes of seizures and greater episodes of ischemic attacks during heavy labor. The onset of seizures was also markedly periodic with stable angina At midnight to 6 o’clock in the morning attack the least, when 2 to 4 hours after the onset of seizures significantly increased after the hair