Fig. 1.

(A) Twelve-lead electrocardiograms of the non-sustained ventricular tachycardia. (B) Transthoracic echocardiography demonstrating the presence of an RV-MB (yellow arrows). (C) Activation maps during the VPCs demonstrating the earliest activation (dark red) on the RV septum in the left posterior view. The red and yellow tags on the maps represent the RF application sites and earliest activation site, respectively.

Abbreviations: LA, left atrium; LV, left ventricle; RA, right atrium; RV right ventricle; TA, tricuspid annulus.