Successful Percutaneous Retrieval of a 33-mm Watchman Left Atrial Appendage Occlusion Device From the Left Atrium

An 84-year-old man with permanent atrial fibrillation was referred for left atrial appendage (LAA) occlusion with a CHA2DS2-VASc score of 3 and a HAS-BLED score of 4. Pre-operative transesophageal echocardiography identified a LAA ostial diameter of 30 mm. A 33-mm Watchman device (Boston Scientific