You can have your left atrial appendage closed off surgically. That is where over 90%+ of blood clots form re: afib. There are "devices on the market now, ( the Watchman", and a few others) that plug the opening but they must be sized right, installed right, blood thinners while skin grows over the device to "seal it" and a blood clot could form on the device itself. ( just a money maker in my opinion).
I had mine closed surgically during an open heart surgery and am just taking Plavix and baby aspirin which I tolerate well. Too many side effects from all these DOAC's and anti arrythmic drugs. $$$?