Weismüller P, Pu J L, Grossmann G, Höher M, Kochs M, Hombach V
Abteilung Innere Medizin II, Universität Ulm.
Z Kardiol. 1995 Sep;84(9):724-8.
In a female patient with paroxysmal AV nodal reentrant tachycardias the electrophysiological study revealed three AV nodal pathways. During atrial extrastimulation a sudden AH interval prolongation of more than 50 ms ("break" phenomenon) was observed twice at one basic cycle length. During ventricular extrastimulation a sudden prolongation of the AH interval of the anterograde AV nodal conduction of the induced echo beats was recorded. Three AV nodal pathways were thus present. The atypical form of AV nodal reentrant tachycardia was induced, showing a varying cycle length (290-340 ms). After radiofrequency catheter ablation of the fast conducting beta-pathway, another tachycardia was initiated, now showing a constant cycle length, using the two remaining, more slowly conducting alpha-pathways. One of these was eliminated in another ablation procedure.
在一名患有阵发性房室结折返性心动过速的女性患者中，电生理研究显示存在三条房室结通路。在心房额外刺激期间，在一个基础周期长度下两次观察到突然的AH间期延长超过50毫秒（“中断”现象）。在心室额外刺激期间，记录到诱发回波搏动的房室结前向传导的AH间期突然延长。因此存在三条房室结通路。诱发了房室结折返性心动过速的非典型形式，其周期长度变化（290 - 340毫秒）。在对快速传导的β通路进行射频导管消融后，又诱发了另一种心动过速，现在使用剩余的两条传导较慢的α通路，显示出恒定的周期长度。在另一次消融手术中消除了其中一条通路。
