Shirai Yasuhiro, Goya Masahiko, Isobe Mitsuaki, Hirao Kenzo
Heart Rhythm Center, Tokyo Medical and Dental University, Tokyo, Japan.
Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
J Cardiovasc Electrophysiol. 2015 Jul;26(7):805-8. doi: 10.1111/jce.12669. Epub 2015 Apr 22.
A 57-year-old male who presented with frequent ventricular premature contraction (VPC) was referred for catheter ablation. Two different QRS morphologies (VPC1 and VPC2) were recorded. Pace mapping at the right ventricular outflow (RVOT) was identical to VPC1 without latency. During the mapping within the right sinus of Valsalva where the RF applications were successful for elimination of VPC, discrete prepotential was recorded and the pace mapping produced both VPC1 and VPC2 morphology with different latency. These electrophysiological findings were thought to prove the existence of preferential pathway traversing the ventricular outflow septum with different exit sites.
一名57岁男性因频发室性早搏（VPC）前来接受导管消融治疗。记录到两种不同的QRS形态（VPC1和VPC2）。右心室流出道（RVOT）的起搏标测与VPC1相同，无延迟。在Valsalva窦右侧进行标测时，射频消融成功消除了VPC，记录到离散的预激电位，起搏标测产生了具有不同延迟的VPC1和VPC2形态。这些电生理结果被认为证明了存在穿过心室流出道间隔且具有不同出口部位的优先传导路径。
