So here is what I've done and I haven't had an full blown AFIB episode since starting it. I've had periods where I felt AFIB was going to start but it hasn't.
The answer for me seems to be probiotics, massive doses of probiotics. Yogurt, Kefir, pills with 5,000,000 units of probiotics, a drink called "gut shot" which consists of beet juice and ginger, sour kraut and anything else touted to be heavy in probiotics. Like I said I sometimes feel like AFIB is coming on but I'll go to the fridge, take a shot of the "gut shot" and it seems to prevent the onset.
To me this all ties in with the relationship between digestion and AFIB. I had to take massive doses of antibiotics a few months ago and my AFIB episodes became more frequent after that, almost daily.
Prior to the antibiotics I would get AFIB only if I drank too much alcohol. Then I read about antibiotics and how they kill off all the good bacteria in your gut, and elsewhere. That started me off on my probiotic experiment.
I just wanted to pass this along to see if anyone else has tried this. It can't hurt and may help others.
Note that my AFIB is of the paroxysmal or lone type so may not apply to other types.