My reasoning would say go for the ablation because flecainide causes fatigue and it is not necessarily controlling Afib. That you are now seemingly under control is a "tweener". So it is sort of maybe yes or maybe not. You initially showed a failure of ablation albeit you were maximally stressing your heart during a race. It sounded rather soon to put that kind of stressors on your heart so close to an ablation ( you said "A few months after an ablation the AFib returned after I did some heavy exercise (swimming race). I am assuming you are good athlete and know how to train. What was your training period like? It seems that during your training period you would have also had the opportunity to maximally stress your heart but it didn't go into Afib during you training period?? One could argue it both ways. What you have left out is what was your experience with Afib before you had an ablation? As for PFA it is not the be all to end all: at least right now. Results really will not been known for a couple of more years. So far its biggest + is that there is less trauma to the heart. But the long term results are not here now. My EP wants more results before he jumps in and it sounds like Hopkins is in the same mind set.