I came across this website which contains a lot of useful information. a-fib.com
I had my first Afib event early this year prior to an operation to remove 1/2 my thyroid due to a large goitre causing hyperthyroidism. However since the operation I’ve not had an A-fib occurance except for an increase in ectopic heart beats, which are driving me nuts. I guess my stress levels don't help due to personal problems. I take a number of supplements to help my heart such as Taurine, Arginine, Magnesium, D-Ribose, CO Q10 and fish oil, which seem to help.