Left atrial linear ablation of paroxysmal atrial fibrillation guided by three-dimensional electroanatomical system
- VernacularTitle:阵发性心房颤动的三维电解剖标测指导左心房线性消融治疗
- Author:
Daifu ZHANG
;
Ying LI
;
Weigang QI
- Publication Type:Journal Article
- Keywords:
Atrial fibrillation;
Electrophysiologic techniques, cardiac;
Catheter ablation
- From:
Chinese Journal of Interventional Cardiology
1996;0(04):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the safety and efficacy of Left atrial linear ablation of paroxysmal atrial fibrillation guided by three-dimensional electroanatomical system. Methods 29 patients with paroxysmal atrial fibrillation in this study. A nonfluoroscopic mapping system was used to generate a 3D electroanatomic LA mapping, and all pulmonary vein ostia were marked under the help of pulmonary veins angiography on the 3D map. Radiofrequency (RF) energy was delivered to create continuous linear lesions encircling the pulmonary veins. It was delivered with a target temperature of 43℃, a maximal power limit of 30W and applied for ≥20 seconds until the maximal local electrogram amplitude decreased by ≥50%. The ablation was completed by finishing the circular line. Results The mean procedure duration was 180?18 minutes, with mean fluoroscopy time of 80?20 minutes. The average number of RF pulses was 120?15. After a follow-up of 6.0 months, 24 patients maintained sinus rhythm. 3 patients suffered from less frequent paroxysmal atrial fibrillation during the first 3.0 months after the ablation and remained Af free after 6 months. 1 patient had atrial fibrillation episodes and 1 patient had atrial fibrillation attacks unchanged. No pulmonary vein narrowing was observed. Conclusion Left atrial linear ablation of paroxysmal atrial fibrillation guided by three-dimensional electroanatomical system was safe and effective.
