PM019 Successful ablation of the arrhythmogenic substrate in the epicardial right ventricular outflow tract in a patient with Brugada syndrome refusing implantable cardioverter defibrillator therapy

Abstract

O ST E R A B ST R A C T S anatomy. In previous studies, respiratory compensated electroanatomical maps showed better correlation with pre-acquired computed tomography and magnetic resonance images. However, better correlation does not always mean better ablation results and impact of respiratory gating on AF ablation hasn’t been studied yet. Objectives: The aim of this study was to determine the impact of respiratory gating on procedural outcome in patients undergoing catheter ablation of AF. Methods: One-hundred-twenty-eight consecutive patients undergoing pulmonary vein isolation were enrolled to study. All procedures were performed with Carto3 system and image integration. Respiratory gating module (Accuresp algorithm, Carto3, Biosense Webster) was enabled in 42 patients and disabled in 85 patients during procedures. Results: A significant reduction in total procedure times [median 72, interquartile range (IQR) 64-95 min vs median 84 (IQR) 71-104 min, p<0.05] and fluoroscopy times [median 13.6(IQR) 8.5-15.8 min vs median 15.7(IQR) 11.8-22.4 min, p<0.05] were observed in the respiratory gated group. Although ablation times (duration between the first and last ablation) were significantly shorter in respiratory gated group [median 38 (IQR) 34-54 min vs median 48 (IQR) 39-65 min, p<0.05], total RF application times (total value of automatically calculated application durations) were not different between the two groups[median 1547 (IQR) 1169-2250 second vs median 1847 (IQR) 1350-2451 second, p1⁄40.094].Difference in electroanatomical map reconstruction times were not significant between the two groups [median 14 (IQR) 12-17 min vs median 13 (IQR) 10-17 min, p1⁄40.138].