
1. Abstract
Percutaneous closure of the Left Atrial Appendage (LAA) is a novel approach to the prevention of embolic events in patients with Atrial Fibrillation (AF), high risk of stroke and contraindications to long-term anticoagulation. However, periprocedural and post procedural complications (including cardiac tamponade, procedural stroke, embolization of device or transient myocardial ischemia) are common and may outweigh the benefits of avoiding anticoagulants. The previously described potential mechanisms causing LAA closure devices embolization included under sizing, excessive oversizing, incorrect device apposition or conversion from AF to sinus rhythm after the procedure.