RESUMO
Introduction: Over the past decade, left atrial appendage occlusion (LAAO) has emerged as an established alternative to oral anticoagulation for patients diagnosed with atrial fibrillation (AF). The LARIAT device stands as the sole available epicardial system for complete percutaneous left atrial appendage (LAA) closure. Aim: To present the extended outcomes (spanning over 9 years of observation) in patients with AF who underwent epicardial LAAO. The presented results constitute the longest observation in world literature. Material and methods: A prospective, single-center study was conducted on 121 patients undergoing LAAO with the LARIAT system. Incidence of thromboembolic events and severe bleeding and mortality rates were documented. The reduction in the risk of thromboembolism and bleeding after LAAO was quantified. Results: The mean follow-up duration was 74.18 months. The average CHADS2 score was 1.9 ±1.0, CHA2DS2-VAS score was 2.8 ±1.5, and HAS-BLED score was 2.7 ±1.0. The mean annual thromboembolic event rate was 0.7%, resulting in a 75% reduction in estimated thromboembolic risk. The annual occurrence of major bleeding complications was 0.8%, leading to a 67.9% reduction in estimated bleeding risk. The overall annual mortality rate was 1.2%. Conclusions: Epicardial LAAO employing the LARIAT device yields commendable long-term outcomes by reducing stroke and bleeding risk.