I am not aware of any direct relationship, but I suppose one could stimulate the other, say AFib
causes you to swallow air, and get bloated ... and/
or gas causes emotional stress and that triggers the AFib.
In any case, I too believe if you get a successful ablation (have you been given the odds?) it will be gone and if there is an associated reaction, such as swallowing air, the gas will decrease too. Again, I don't see a direct connection between AFib and bloating.