and see if you can get guidance - sometimes the nursing staff can be the intermediary.
I had a massive saddle PE (blood clot) in my late 40s and I was worried about what it meant as far as activity. It had put a lot of pressure on the right side of my heart, so I went in for a check-up with a cardiologist I had visited for high blood pressure. 3 months after the clot I was in good shape - my heart and lungs were both functioning normally. I was still on a beta blocker for the borderline hypertension, and a blood thinner due to the severity of the clot. I took trips to the Grand Canyon and Hawaii within a few years, and eventually to Europe. It's been over 10 years for me now. I see a hematologist once a year for my thinner renewal, and I call his office if I ever have a situation where I'd hold my medicine (dental surgery, etc.). Sometimes there aren't hard and fast rules is what I've learned; because each individual person has their own issues. When I talked about returning to exercise after the clot my cardiologist advised "no problem w/exercise, but pace yourself. Do not overdue, it has only been 3 mos.". I don't know specifically about A-fib, but I wouldn't be surprised if it's similar in that you can do things, but with care. Maybe no bungee jumping!
In my blood clot group, they call it "a new normal" when we have to adjust after events like these. We can get back to previous routines, sometimes with more rest breaks.