Additional Study Information: This is a multicenter, prospective randomized study to determine the safety and efficacy of the Watchman device in patients with irregular heart beat undergoing a less invasive procedure than open heart surgery called Transcatheter Aortic Valve Replacement (TAVR). In this procedure, an x-ray is used to visualize and guide the Watchman device via a catheter to replace the heart valve. This is done for patients with aortic stenosis (AS) where there is reduced blood flow, pain and fatigue because the blood has to work harder to pump blood due to narrowed valves in the blood vessels. The watchman device is FDA approved for stroke prevention in patients with (AF). The aim is to investigate outcomes of implantation of the watchman device in patients with AF undergoing TAVR.