B-PO02-088 PREVIOUS CATHETER ABLATION FOR ATRIAL FIBRILLATION IS ASSOCIATED WITH LOWER EFFICACY OF THORACOSCOPIC AF ABLATION, UNCOVERING A SUBCLINICAL FIBROTIC SUBSTRATE

A previously failed catheter ablation (CA) may be associated with increased recurrence of atrial fibrillation (AF) after thoracoscopic AF ablation (TA). Patients with a failed CA may have clinical characteristics associated with worse outcome, and a more fibrotic atrial substrate. To compare AF recurrence in patients with a previously failed catheter ablation to propensity matched naive controls, undergoing thoracoscopic AF ablation. TA was...