Quoted from xsvtoys:

Good luck with your health. Some of the things that were said don't match up with what I was told about a-fib at all. Are you going to get a follow-up with a specialist? If there is one thing they hammer on about a-fib, its that it is not an immediate life-threatening condition. Yes it will cause increased odds of a stroke, yes it can go off and make you very uncomfortable, but it does not cause your heart to stop from what I understand. Also, I never heard mention of a pacemaker for a-fib. For other types of arrhythmias, yes a pacemaker might be common but it was never once mentioned to me to get a pacemaker.
The internet is nowhere to get medical advice of course But I know more about a-fib than most. Sudden onset, idiopathic persistent a-fib, cardioversions, anti-arrhythmia drugs, blood-thinning drugs, the heart rate monitor thingie that you wear, and finally, ablation surgery - I've lived through it all. The ablation did the trick and cured me, at least for 2 years so far.