I had chronic a-fib and a-flutter. I would meditate during an episode. It did not prevent an episode, but I did feel it helped the severity of the episode. I eventually had to have an ablation done to prevent my a-fib an flutter.
my afib was mostly vagal and I started Yoga a few months back and while I don't know if its the Yoga or all of the other changes I have made, the Yoga doesn't seem to be hurting anything and it's helping me become more "aware" of my body and I'm getting a little more limber and it's helping my posture alot.
I also do pilates and this does'nt seem to bother me either.
I encorporate the meditaion into my Yoga routine at the end of my sessions.
All l can do is wait along with you to see what comes in.
For my part, a person in permanent AFib, I maintain a positive attitude and "believe" the AFib might stop some day...but not because of my attitude. I had heart surgery in November 2007 and the repaired mitral valve has taken the "back pressure" off of my left atrium - thus it is returning to normal size (not as enlarged as it was - doubt it will come back all the way to normal, but each centimeter helps). Or, said another way, while I think a postivie mental attitude helps, I believe AFib is a physical fact and until something changes the electrial signal network to correct the problem, the fibrillation will continue, not necessarily full time, as is my case.