Abstract
This study sought to document the closure rate, safety, and stroke rate after thoracoscopic left atrial appendage (LAA) clipping. The LAA is the main source of stroke in patients with atrial fibrillation, and thoracoscopic clipping may provide a durable and safe closure technique. The investigators studied consecutive patients undergoing clipping as part of a thoracoscopic maze procedure in 4 referral centers (the Netherlands and the United States) from 2012 to 2016. Completeness of LAA closure was assessed by either computed tomography (n = 100) or transesophageal echocardiography (n = 122). The primary outcome was complete LAA closure (absence of residual LAA flow and pouch <10 mm). The secondary outcomes were 30-day complications; the composite of ischemic stroke, hemorrhagic stroke, or transient ischemic attack; and all-cause mortality. A total of 222 patients were included, with a mean age of 66 ± 9 years, and 68.5% were male. The mean CHA2DS2-VASc (congestive heart failure, hypertension, age ≥75 years, diabetes mellitus, prior stroke or transient ischemic attack or thromboembolism, vascular disease, age 65 to 74 years, sex category [female]) score was 2.3 ± 1.0. Complete LAA closure was achieved in 95.0% of patients. Ther...Continue Reading
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