216-12: The Efficacy of Contact Force Catheter for Ablation of Atrial Fibrillation: Reduction of Dormant Conduction, Procedure Time and Fluoroscopy Time

Abstract

Purpose of the study: Catheter ablation is being increasingly employed for the treatment of atrial fibrillation (AF). Catheter contact is an important determinant of lesion size. Contact force (CF) catheter technology may improve the ablation quality. The purpose of this study is to evaluate the procedural benefit of CF catheter. Method used: Sixty-eight consecutive patients, who underwent initial AF ablation including pulmonary vein isolation, were enrolled. We divided them to CF group (n = 52) and non-CF group (n = 16) according to the ablation catheter type. Dormant conduction was investigated by a bolus administration of 30mg of adenosine triphosphate during a continuous isoproterenol infusion (1.0-2.0 µg/min). Incidence of dormant conduction, procedure time and fluoroscopy time were compared between two groups. Summary of results: Dormant conduction, procedure time and fluoroscopy time were significantly reduced in CF group compared with non-CF group (Table1). Using multivariate analysis, dormant conduction was significantly associated with contact force catheter use (p = 0.018, 95% CI 0.020-0.708), not associated with atrial fibrillation type (persistent/paroxysmal: p = 0.675, 95% CI 0.165-11.108, long-standing/paroxysmal: p = 0.724, 95% CI 0.200-8.750) or left atrial diameter (p = 0.393, 95% CI 0.926-1.228)(Table2). Conclusion: Contact force catheter is effective to reduce dormant conduction, procedure time and fluoroscopy time during AF ablation. Table1 Table1