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1:2房室传导是指1个房性激动同时通过2个传导性及不应性不等的途径下传至心室,并引起2次心室激动。心电图表现为1个P波后继2个QRS波,易误诊为结性或室性早搏、心动过速等,通常需赖电生理检查方能确诊。本征根据传导途径可分2种:1种为1个房性激动通过房室旁道,同时还通过正常结希区,二者先后激动心室。另一种为1个房性激动同时通过房室结快慢径路先后下传到心室。兹介绍于下。
1: 2 Atrioventricular conduction refers to an episode of an atriality that is simultaneously transmitted to the ventricles through two pathways of varying degrees of conductivity and non-responsiveness and induces secondary ventricular activation. ECG showed a P wave followed by two QRS waves, easily misdiagnosed as nodular or ventricular premature beats, tachycardia, etc., usually need to rely on electrophysiological examination before diagnosis. According to the intrinsic route of conduction can be divided into two kinds: one kind of 1-atrial agitation by atrioventricular bypass, but also through normal junction area, the two have excited the ventricle. The other is an atrial excitement at the same time through the atrioventricular node pathway has been downloaded to the ventricle. It is introduced below.