冠心病患者中,有些病情突然加速发展为急性心肌梗塞或猝死,但无症状。例如,心肌梗塞病例中,仅20%病前有心绞痛;冠心病猝死患者中,半数以上生前并无症状。因而认为,冠心病标志应是心肌缺血(主要是隐性缺血),而不是心绞痛症状。根据这一概念,习称的“不稳定型心绞痛”一词,宜改称为“不稳定性心肌缺血。病理生理 In patients with coronary heart disease, some conditions suddenly accelerated the development of acute myocardial infarction or sudden death, but asymptomatic. For example, only 20% of patients with myocardial infarction have angina pectoris; more than half of patients with sudden coronary death have no symptoms. Therefore, coronary heart disease sign should be myocardial ischemia (mainly occult ischemia), rather than angina symptoms. According to this concept, Xi said the term “unstable angina” should be renamed as “unstable myocardial ischemia.”