From what I've read, the Watchman will protect your HEART from clots, but drugs like Xarelto prevent clots from forming anywhere in your body. I've been on Xarelto for one year now and have had no bad side effects, so I'm opting for "total body" clot protection. There are so many things to consider when we're faced with anti-coagulation therapy. Do your homework and don't let anyone talk you into something because they get a bigger kick-back from the company but leaves YOU at risk. Sometimes there are no "do-overs" for people like us. I wish you the best. I wish ALL of the best!