Mapping and localizing presystolic Purkinje potentials are crucial for determining the optimal ablation site for fascicular premature ventricular contractions (PVCs). Here we present a case of PVCs originating from the distal left anterior fascicle (LAF). Activation mapping using a multipolar catheter with small electrodes demonstrated early presystolic Purkinje potentials during the PVCs. A moderately good pace-map match was also obtained near the successful ablation site. This case demonstrates the activation pattern of PVCs originating from the distal LAF and the usefulness of multipolar catheters with small electrodes for the mapping of fascicular PVCs.

绘制和定位收缩前浦肯野电位对于确定束状室性早搏 (PVC) 的最佳消融部位至关重要。在这里，我们介绍一例源自远端左前束 (LAF) 的 PVC。使用带有小电极的多极导管进行的激活映射显示了 PVC 期间的早期收缩前浦肯野电位。在成功的消融部位附近也获得了适度良好的起搏图匹配。该病例证明了源自远端 LAF 的 PVC 的激活模式，以及带有小电极的多极导管对分支 PVC 的映射的有用性。