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一、SMI的分类和病理生理SMI分类采用Cohn1986年报告的分类法:Ⅰ型,有心肌缺血无自觉症状;Ⅱ型,心肌梗塞后无胸痛发作,但有心肌缺血;Ⅲ型,有明显心绞痛症状,有时却表现为无症状性心肌缺血。1987年Cohn又进一步提出以下三点诊断条件:①无自觉症状,运动负荷心电图(ST段升高、降低)阳性;②Holter心电图阳性;③冠脉造影有明显狭窄而无缺血症状者。SMI病因是由于高龄心肌细胞变性及糖尿病等各种原因造成的神经系统障碍使痛觉阀值
First, the SMI classification and pathophysiology SMI classification using Cohn1986 report of the sub-law: type I, no symptoms of myocardial ischemia; type II, no chest pain after myocardial infarction episodes, but with myocardial ischemia; type III, there was significant Angina symptoms sometimes show asymptomatic myocardial ischemia. 1987 Cohn further proposed the following three diagnostic criteria: ① no symptoms, exercise-load electrocardiogram (ST segment elevation, decreased) positive; ② Holter electrocardiogram positive; ③ coronary angiography with significant stenosis without ischemic symptoms. SMI etiology is due to advanced cardiomyocyte degeneration and diabetes and other causes of nervous system disorders so pain threshold