Mid-Term Results of Totally Thoracoscopic Ablation in Patients with Recurrent Atrial Fibrillation after Catheter Ablation

Abstract

Background: We investigated the impact of previous catheter ablation (CA) on the mid-term outcomes of totally thoracoscopic ablation in patients with lone atrial fibrillation (AF).Methods: Between February 2012 and July 2018, 332 patients underwent totally thora-coscopic ablation for the treatment of AF (persistent AF; n=264, 80%). The patients were stratified into CA (n=47, 14%) and non-CA (nCA; n=285, 86%) groups according to their CA history.Results: All the baseline clinical characteristics and risk factors were similar between the groups except for age, percentage of male patients, prevalence of paroxysmal AF, prior percutaneous coronary intervention, and left atrial volume index (LAVI). No significant in-tergroup differences were observed in the incidence of early and late complications. At late follow-up, normal sinus rhythm was observed in 92% (43 of 47) of the patients in the CA group and 85% (242 of 285) of the patients in the nCA group (p=0.268). The rate of free-dom from AF recurrence at 5 years was 55.3%±11.0% in the CA group, which was similar to that in the nCA group (55.7%±5.1%, p=0.690). In Cox regression analysis, preoperative brain natriuretic peptide levels and LAVI were associated with AF recurrence, but CA his-tory was not significant.Conclusion: Totally thoracoscopic ablation was safe and effective in treating AF irrespec-tive of CA history. A history of CA did not appear to affect the procedural complexity.

Keywords

• atrial fibrillation
• radiofrequency catheter ablation
• totally thoracoscopic ab-lation