I thought I WAS clear, and used the term 'semi-permanent' when describing the relief that ablation affords a heavy majority of AF endurers. Ablation is loosely successful when the patient has been free of palpitations and assessed AF for a period of one full year...only. And yes, it is true, that almost all patients must endure the return of AF in time, and that is due to the progressive nature of the disorder. However, while AF can't kill a person, it can sure as aitch make them miserable to the point where their anxiety, suffering, and other associated conditions make them impossible to support and to live with. It does shorten lives because of the heightened risk of heart failure and stroke. Apixaban has a growing track record of being safe and easily tolerated by the heavy majority of users, and I'm not talking about a whopping 80%, it's more like 95%. It cuts the risk of stroke from untreated AF to 10% of the estimated risk. Not so shabby, wouldn't you agree?
When I urged the OP to acquaint him/herself with the function of the Vagus nerve, I was passing on what I learned from a discussion in affibbers.org where the purported role was being discussed, and it made sense. Since some people report that soothing the Vagus nerve helped to reduce their paroxysmal AF, it seems reasonable to pass this on, certainly in view, as you say, of the fact that there is NO establishment of the causes of AF.