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关于心绞痛心电图变化的概念,一般都局限在能显示心绞痛、冠状动脉供血不足或急性心肌梗塞的QRS波、T波和ST段的异常上。少数认为可有U波倒置,TU段降低。Averill和Lamb发现外观正常的检查对象8.6‰有ST段和T波的异常,而有PR间期延长者仅5.2‰。Manning指出,在17,000名结实、健康的青年人中有489例(28.8‰)单独出现T波变化。但在正常人中Ⅰ度房室传导阻滞的发生率则较低,它的出现则指示有诊断心脏病的可能性。以前除非在急性心肌梗塞出现传导障碍时提及PR间期延长,而一
The concept of ECG changes on angina is generally confined to displaying QRS, T wave and ST segment abnormalities in angina, coronary insufficiency or acute myocardial infarction. A few believe that there may be U wave inversion, TU segment lower. Averill and Lamb found that 8.6 ‰ of ST-segment and T-wave abnormalities were normal in subjects whose appearance was normal, while only 5.2 ‰ of those with PR interval were extended. Manning pointed out that in 17,000 strong, healthy young people, 489 (28.8%) had T wave changes alone. However, the incidence of Ⅰ degree atrioventricular block in normal people is lower, and its appearance indicates the possibility of diagnosing heart disease. In the past, unless there was a conduction disorder in acute myocardial infarction, mention was made of PR interval prolongation,