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Thoracoscopic Left Atrial Appendage Occlusion with the AtriClip PRO2: An Experience of 144 Patients.

AIM: To report the clinical outcomes of thoracoscopic left atrial appendage occlusion (LAAO) with the AtriClip PRO2 device (Atricure Inc, Mason, OH, USA). Stroke risk reduction with LAAO in patients with atrial fibrillation is now well-established. Many surgical and percutaneous techniques have been used, with varying rates of success. The percutaneous devices have had issues with procedural complications and peridevice flow. Thoracoscopic AtriClip offers an epicardial linear closure of the appendage at its ostium. This study sought to evaluate its safety and efficacy in achieving complete LAA closure.

METHOD: This is a prospective series of thoracoscopic AtriClip PRO2 as a standalone procedure or a thoracoscopic AtriClip deployed as an adjunct to minimal access cardiac and thoracic surgery. Study ethical approval was granted by the hospital Human Research Ethics Committee.

RESULTS: In total, 144 thoracoscopic AtriClip procedures were conducted by a single surgeon from 2017 to 2022, 56 standalone and 88 concomitant. There was no mortality or major morbidities. A 100% success in complete LAA closure was observed, with 87% complete follow-up imaging. For patients that underwent standalone AtriClip after cessation of anticoagulation, no thromboembolic phenomena were seen in the 180 patient-years of follow-up.

CONCLUSIONS: This study demonstrates that thoracoscopic placement of AtriClip is safe and effective in achieving consistent and complete LAAO. Future randomised trials will be useful to compare outcomes with percutaneous devices.

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