Application of magnetic navigation in catheter ablation of premature ventricular contraction originating from the right ventricular outflow tract
Objective To investigate the effectiveness and safety of catheter ablation for premature ventricular contraction(PVC)originating from the right ventricular outflow tract(RVOT)guided by magnetic navigation.Methods We selected 92 patients undergoing catheter ablation for RVOT origin PVC guided by magnetic navigation.They were divided into six groups based on the origin site of PVC:anterior septum group(n=35),midseptum group(n=26),posterior septum group(n=11),anterior free wall group(n=4),medium free wall group(n=10),and posterior free wall group(n=6).The incidence of PVC originating from different sites of the RVOT was analyzed in the six groups.The acute success rate of ablation,recurrence rate,and safety were compared among the six groups.Results The incidence of PVC was the highest in the anterior septum of the RVOT,with a 100%of acute success rate of ablation.One year after ablation,recurrent PVC was only found in the midseptum of the RVOT,with a recurrence rate of 7.69%.All patients had no procedure-related complication in intraoperative or postoperative period.Conclusion RVOT origin PVC is mainly originated from the anterior septum and midseptum.Catheter ablation guided by magnetic navigation demonstrates high effectiveness and safety for RVOT originated PVC.
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