Abstract 17380: Endocardial Mapping Findings After Previous Surgical Maze Using Bipolar Radiofrequency Clamps With and Without Electrical Endpoint
Introduction: Minimally invasive surgical ablation of atrial fibrillation (AF) utilizing radiofrequency bipolar clamps is becoming increasingly popular. The aim of this study was to evaluate differences during redo cases with percutaneous catheter ablation (PVI) following surgical ablation performed with or without proven electrical isolation.
Methods: 64 patients undergoing percutaneous PVI following surgical ablations with bipolar radiofrequency clamps have been included in this study. During the surgical procedure in 27 patients electrical isolation was confirmed by pacing maneuvers while in 37 patients no electrical isolation was proven. Fluoro and procedural times to achieve isolation as well as sites of PVs reconnection during the percutaneous redo cases were collected and analyzed.
Results: No differences in term of sex, age, LA diameter, E.F.and AF type were found between groups. In patients with proven PVs isolation during the surgical procedure the redo endocardial ablation required less radiofrequency and fluoro times and a lower number of PVs showed reconnection. In this group, the most frequent reconnected veins were the right inferior and the left superior PVs.
Conclusions: This study shows that catheter ablation of AF following surgical ablations with radiofrequency clamps require less procedural and fluoro times when isolation is confirmed at the time of the surgery.
- © 2010 by American Heart Association, Inc.