Clinical impact of left atrial appendage resection versus preservation during surgical ablation of atrial fibrillation

Abstract

IntroductionResection of left atrial appendage (LAA) during surgical ablation of atrial fibrillation may decrease the incidence of postoperative cerebrovascular events and increase the induction and maintenance of sinus rhythm (SR). This study evaluates the effect of LAA resection after the surgical ablation of atrial fibrillation. Materials and methodsA retrospective analysis was made of 599 patients who underwent surgical myocardial revascularization and/or valve surgery with concomitant surgical ablation of atrial fibrillation. The LAA was resected in 140 patients and preserved in 459 patients. Postoperative, 1-month and 1-year results were compared between the groups in terms of TIA/CVA, maintenance of sinus rhythm, pacemaker dependence and mortality. ResultsThe patients who underwent LAA resection were older, had more frequent persistent AF and underwent more frequently biatrial ablation set. In this group, longer times of extracorporeal circulation and longer cross-clamp times were observed. During the follow-up period, the resection group has shown lower incidence of TIA/CVA and the overall mortality was also lower in this group of patients. ConclusionThe resection group in our study has shown the trend toward lower incidence of TIA/CVA and statistically significant decrease of overall mortality. This finding can support routine LAA resection during surgical ablation of atrial fibrillation.