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无症状性心肌缺血(silent myocardialis-chemia,SMI)的定义是指虽有心肌缺血而并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,既往有心肌梗塞而目前没有缺血的客观表现者,并不能叫做SMI。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。现通常将心电图呈现缺血性改变判定为心肌缺血,但有不少假阳性。动物实验及心导管检查中发现,缺血时首先出现的是局
Asymptomatic myocardial ischemia (silent myocardialis-chemia, SMI) is defined as the absence of angina despite angina or angina pectoris symptoms. SMI is not equivalent to asymptomatic coronary heart disease, past myocardial infarction without the current objective manifestations of ischemia, and can not be called SMI. The key is how to determine the presence of myocardial ischemia and how to estimate the symptoms of angina pectoris. Electrocardiogram is usually ischemic changes were judged as myocardial ischemia, but there are many false positives. Animal experiments and cardiac catheterization found that ischemia first appeared in the bureau