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Early and mid-term outcomes of tricuspid valve surgery in patients with functional tricuspid regurgitation induced by atrial fibrillation.

BACKGROUND: The strategy of treatment for tricuspid regurgitation (TR) induced by atrial fibrillation (AF) has not been established. The aim of this study was to evaluate the outcomes of surgical treatment for TR induced by AF.

METHODS: From 2000 to 2021, a total of 1,301 patients underwent tricuspid valve (TV) surgery. Among them 43 patients who diagnosed as AF induced TR were enrolled. The tricuspid valve-related events (TVRE) included cardiac death, TV reoperation, development of moderate or greater TV disease, congestive heart failure requiring re-admission, and major bleeding or thrombosis. The median follow-up duration was 42.0 months.

RESULTS: The interval from diagnosis of AF to more than moderate TR was 61.2 months, and the interval from initial diagnosis of severe TR to surgery was 2.4 months. Concomitant Cox-maze III procedure was performed in 39 patients. The operative mortality occurred in 1 patient, and there was no permanent pacemaker implantation. Overall survival rates at 1- and 5-year were 90.6% and 79.3%, respectively. The cumulative incidence of TVRE at 1- and 5-year were 16.3% and 26.5%, respectively. The cumulative incidences of AF recurrence at 1- and 3-year in the patients with surgical ablation were 29.7% and 67.6%. The TVRE was significantly associated with the longer interval from diagnosis of severe TR to surgery (hazard ratio: 1.023, 95% confidence interval: 1.005-1.042).

CONCLUSIONS: TV surgery for TR induced by AF showed low surgical mortality and favorable mid-term outcomes. For these patients, early surgery after progress to severe TR can be helpful to decrease the occurrence of TVRE.

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