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心电图检查是诊断冠心病的简单易行方法,对诊断冠不全、心绞痛及心肌梗塞的敏感性与特异性须要重新进行评价。近年冠心病的研究证明心电图检查不是诊断冠心病的敏锐方法,仅是简便易行的初诊方法。但将心电图检查和临床表现与其他检查有机结合起来,会提高心电图诊断冠心病的阳性率。 一、诊断冠心病的敏感性与特异性 (一) 冠不全 冠状动脉有极大的代偿能力,动物实验证明,冠状动脉的主要分支的管腔减少65％时,通过狭窄的血流仍可增加到休息水平的五倍;只有当冠状动脉的管腔缩小90～95％时,通过狭窄的血流方减少到休息状态以下。有不少的冠状动脉粥样硬化并未达到如此地步,而是在硬化的基
ECG examination is a simple and easy way to diagnose coronary heart disease, the diagnosis of coronary insufficiency, angina pectoris and myocardial infarction sensitivity and specificity need to re-evaluate. In recent years, coronary heart disease studies have shown that ECG is not a sensitive method of diagnosis of coronary heart disease, only a simple initial diagnostic method. However, the combination of ECG examination and clinical examination with other tests will improve the positive rate of ECG diagnosis of coronary heart disease. First, the diagnosis of coronary heart disease sensitivity and specificity (A) coronary insufficiency Coroner has a great ability to compensate, animal experiments show that the main branch of the coronary arteries to reduce 65%, through the narrow blood flow can still Increased to five times the rest level; only when the coronary lumen narrowed 90 ~ 95%, through the narrowing of the blood flow to reduce the rest below. There are a lot of coronary atherosclerosis did not reach such a point, but in the hardening of the base