I found this article to be of interest, particularly with respect to vagal mediated episodes - I have been led to believe by my cardiologist that the vagally mediated forms of af are much less likely to progress to persistent or permanent af - the only doubt being the ongoing question of absolute confirmation of vagal origin which according to my cardiologist is not something they can absolutely guarantee
Absence of Syncopal Episodes (Atrial Fibrillation of Vagal Origin)
Most of the syncopal events that present at the onset of an episode of AF are consistent with a vasovagal mechanism, a circumstance that identifies a group of patients with vagal primary AF in whom the likelihood of recurrence is low, possibly due to the fact that the vagal hyperactivity is a transient episodic event.