Kreiner G, Heinz G, Siostrzonek P, Radosztics S, Gössinger H D
Second Department of Medicine/Division of Cardiology, University of Vienna, Austria.
Pacing Clin Electrophysiol. 1993 Aug;16(8):1759-68. doi: 10.1111/j.1540-8159.1993.tb01050.x.
In a patient with a left sided accessory pathway (AP) three different types of orthodromic circus movement tachycardia were observed: (1) narrow QRS complex tachycardia with a stable cycle length (CL); (2) wide QRS complex tachycardia with a functional bundle branch block ipsilateral to the AP, which, paradoxically, had a shorter CL. The decrease in CL was due to a decrease of the AH interval; and (3) narrow QRS complex tachycardia with alternating CL, due to alternations of the AH interval. These phenomena were attributed to a concomitant dual atrioventricular (AV) node, which was eventually proven after successful catheter ablation of the AP.
在一名左侧旁路（AP）患者中，观察到三种不同类型的顺向型折返性心动过速：（1）QRS波群窄的心动过速，其周期长度（CL）稳定；（2）QRS波群宽的心动过速，伴有与AP同侧的功能性束支阻滞，矛盾的是，其CL较短。CL的缩短是由于AH间期缩短所致；（3）QRS波群窄的心动过速，CL交替变化，原因是AH间期交替变化。这些现象归因于并存的双房室（AV）结，在成功进行AP导管消融后最终得到证实。
