Ventricular Tachycardia Originating from Moderator Band: New Perspective on Catheter Ablation

Figure 2

(a) Pacing mapping showed that the morphology of pacing QRS complex is identical to the QRS complex of clinical IVT (inside the red box). (b) A complex fractionated, high frequency potential with long duration of 57 milliseconds, preceding the QRS onset of the IVT by 23 milliseconds. (c) A conduction block of Purkinje potential (red arrow) was observed during the sinus rhythm after successful ablation during the first procedure.