Abstract
Objective To study the feasibility, safety, effectiveness of left atrial circumferential ablation of pulmonary veins for atrial fibrillation(Af) guided by EnsiteNavX mapping system. Methods Seventeen patients with paroxysmal or persistent Af were included. Real time 3-dimensional left artial (LA) and pulmonary veins (PVs) maps were constructed through EnsiteNavX mapping system. Pulmonary veins isolation was performed by encircle the left and right sides PVs at adistance of 1 to 2 cm away from the ostium of PVs. Results Seventeen patients were all reached the endpoint of abalation completely. The mean procedure time and fluoroscopy time were (226.1 ± 36.2) minutes and (41.3 ± 12.8) minutes. Mean radiofrequency energy delivery time was (61.9 ±15.4) minutes. Recur-rence of Af occurred in two patients, one was repeat ablation succnssfully. During 3 ～ 36 months followup, fourteen patients (82.3%) were free of Af without any antiarrhythmic drugs. Recurrence of Af occurred in three(11.7%) patients treated with amiodarone. No complications occurred during the procedure and the following up. Conclusion Left atrial circumferential isolation of pulmonary veins for Af guided by Ensite NavX mapping system was effective and salty. Key words: Atrialfibrillation; Catheter ablation
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