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所谓心室内差异传导,是指早期发生的室上性激动到达心室时产生QRS波变形的一种心电图改变,亦称机能性束支阻滞或3位相阻滞。由于其QRS波酷似心室源性,特别是当难以或不能确定其来自室上性时(如房颤)更难与室源性者鉴别。 目前,应用希氏束电图(HBE)和心腔内电生理检查已成为鉴别二者的主要方法.对心房行早期刺激,常常诱发心室内差异传导,一般多显示右
The so-called ventricular differential conduction, refers to the early occurrence of supraventricular activation of the heart chamber to produce QRS wave deformation ECG changes, also known as functional bundle branch block or 3 phase block. Because QRS waves resemble ventricular origin, it is more difficult to identify with those with ventricular origin especially when it is difficult or impossible to determine if it is supranuclear (eg, atrial fibrillation). At present, the application of His Echocardiography (HBE) and intracardiac electrophysiological examination has become the main method to discriminate the two.Animal stimulation of the atrium often induces differential conduction in the ventricle, and usually displays more