PO-04-001 COMPARISONS OF ABLATION LESION FEATURES ALONG PULMONARY VEIN ISOLATION LINES USING RADIOFREQUENCY ABLATION CATHETER AND CRYOBALLOON ABLATION CATHETER

Direct cell injury and intense inflammatory response occur in radiofrequency ablation (RFA), therefore, heterogeneous lesions were created. Conversely, cryoballoon (CBA), lesion is created without of endocardial tissue architecture catheter position stable by adhesion the to tissues, hence homogeneous However, few studies have investigated homogeneity border zone between left atrium pulmonary vein isolation (PVI) lines among energy sources. We hypothesized that along PVI are more frequently found patients undergoing RFA than those CBA. The purpose this study was investigate association source ablation. In total, 79 consecutive who underwent second AF with RhythmiaTM mapping system (age, 70 ± 9 years; female, 26 [33%]) retrospectively enrolled. As an indicator lesion, gaps fractionated signals previous assessed during pacing from right atrium. Fractionated signal defined as electrograms at least 7 deflections highlighted LUMIPOINTTM complex activation tool. proportion line length anatomical compared CBA performed for 31 (39%) initial There PV group (1 [1-2] versus 0 [0-1], p < 0.001). Anatomical similar (left vein, 121 [109-136] mm 118 [107-133] mm, = 0.78; 126 [116-139] [108-131] 0.08). significantly higher (Figure). regions other posterior region, bottom region also demonstrated serrated bordering zones, whereas using sharply delineated lesions.