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Fig. 2 | BMC Cardiovascular Disorders

Fig. 2

From: Radiofrequency catheter ablation of ventricular arrhythmias arising from the region above pulmonary valve

Fig. 2

Radiofrequency catheter ablation of PVCs rising from PAC. a Activation mapping of PVCs in the PAC. The PVCs exhibited a left bundle branch block (LBBB) morphology and inferior axis deviation, rs morphology in lead I, QS morphology in both aVL and aVR with QSaVL>QS aVR, rS pattern in lead V1-V2, R morphology in lead II, III and aVF and V4-V6, precordial transition zone between lead V2-V3. Activation mapping showed local ventricular activation with initial discrete peak potential preceding the QRS onset by 37 ms. b Pace mapping showed a 11-lead match between paced QRS and clinical PVCs. c Angiograph of pulmonary artery prior to ablation showed the tip of ablation catheter located in anterior PSCs. Energy application in PAC led to instant elimination of PVCs. The PVCs could not be induced by further isoproterenol administration combined with programmed electrical stimulation. No recurrence was reported during the follow-up of 2 years

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