Feasibility Study of a Left Atrial Appendage Closure Device in Patients With Atrial Fibrillation

The purpose of this study is to assess the safety and function of the Aegis Sierra Ligation System in accessing and closing off the left atrial appendage (LAA) using a minimally invasive epicardial access approach. A minimum of 30 participants will be included in this study, which is being performed at a maximum of 8 centers in Canada and the United States. (A maximum of 15 participants at 4 US centers will be enrolled) Participants will be considered for this treatment if their doctor(s) have determined they have documented non-valvular atrial fibrillation and are at increased risk for developing a stroke.