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近年来,冠心病患者的无症状性心肌缺血(SMI)日益受到重视,许多学者对其临床特点、发生率、发病机理以及药物效应等方面进行了广泛的研究。一、定义和分型:SMI是指只有心肌血而无心绞痛或与心绞痛相当的症状。SMI并不等同于无症状性冠心病。关键是如何判断心肌缺血的存在和怎样估计与心绞痛相当的症状。Cohn将SMI分为三型:Ⅰ型为完全无症状心肌缺血:Ⅱ型为心肌梗塞(MI)后的无症状心肌缺血发作;Ⅲ型为心绞痛患者伴有的无症状心肌缺血发作。二流行病学:SMI的发病率高低与检查方法和判断的方法不同有关。根据不同报道,在所谓正常人群中的发病率高达2.5～10%.Dianmond等
In recent years, asymptomatic myocardial ischemia (SMI) has been paid more and more attention in patients with coronary heart disease, and many scholars have conducted extensive research on its clinical features, incidence, pathogenesis and drug effects. First, the definition and classification: SMI refers to only myocardial blood without angina pectoris or symptoms comparable with angina. SMI is not equivalent to asymptomatic coronary heart disease. The key is how to determine the presence of myocardial ischemia and how to estimate the symptoms of angina pectoris. Cohn classified SMI into three types: type I as complete asymptomatic myocardial ischemia: type II asymptomatic myocardial ischemic attack after myocardial infarction (MI); type III asymptomatic ischemic attack associated with angina pectoris. Second Epidemiology: The incidence of SMI and inspection methods and judgments of different ways. According to different reports, the so-called normal population incidence of up to 2.5 to 10% .Dianmond et al