The underlying conditions for PACs are present and will probably be there forever. However, like so many conditions that beset we humans, they can be dormant for years and only surface in the right circumstances. Often it is a stress response brought on by lack of sleep, worry, anxiety, physical trauma, mental/emotional trauma, sometimes even a sunburn or too much sun (those with trigeminal Herpes Simplex lesions know this), new medications, changes to doses of medications, diet, alcohol, recreational drugs, a pathogen...it's a long list.

I have what is called 'sleep onset central apnea', but it only seems to surface after a hospital intervention such as a catheter ablation or an angiogram for me...so far in my history. Otherwise, normally, my only problem is obstructive sleep apnea that a CPAP machine, correctly fitted and worn, and correctly set for the prescribed pressures, does a good job neutralizing. If I fall asleep after supper while watching TV, and yes, at 74, and as the grandson of a gentleman who did that 60 years ago, I do fall asleep after supper, I immediately start snoring. So, even if my now nine year use of a PAP machine has been stellar, and probably saved my life, if I don't use one while falling asleep, that 'underlying condition' pops right up on cue.

So, almost certainly, yes, you are still predisposed to have PACs surface again in the right circumstances. Right now, you're good, and should only think about starting to worry about them if/when they become so frequent that they are truly intrusive and they don't seem to want to stop after a few days.