房室结多径路传导是一种常见的电生理现象。但根据两种心动过速间期交替诊断为房室结三径路传导,国内报道极少。我们遇见1例,并经心房调搏证实,报告如下。患者女性,32岁。半月内2次突发心悸,均为体位改变诱发,既往偶有类似发作史,无器质性心脏病。心电图(图1,见第238页)见快速而有规律的室上性QRS波,频率平均176次/分。QRS波前后无P’波,R-R间期呈长短交替分别为0.29和0.38秒。QRS-T波形态 Atrioventricular node multi-path conduction is a common electrophysiological phenomenon. However, according to two kinds of tachycardia alternating between the diagnosis of atrioventricular node three pathways, very few domestic reports. We met one case, and confirmed by atrial pacing, the report is as follows. Patient female, 32 years old. 2 times within half a month heart palpitations, are induced by changes in position, the previous occasional similar episodes of history, no organic heart disease. The electrocardiogram (Figure 1, see page 238) sees fast and regular QRS waves of supraventricular tachycardia with an average frequency of 176 beats / min. QRS wavefront without P ’wave, R-R interval was alternating between the length of 0.29 and 0.38 seconds. QRS-T wave morphology