In reviewing your initial question, o see that you did ask about other medications. I was first diagnosed because of repeated afib incidents requiring cardioversion. I'm also on blood thinners and a beta blocker. I also have an ostomy having had my colon removed. The lead up to that was sudden and dramatic. Personally I always wondered if there was a bacterial contamination from my gut to my heart. But I'm a good patient and try not to impose odd speculation on my excellent cardiologist!