Basically PCV’s are when your heart skips beats from its normal rhythm which are mostly harmless if your otherwise healthy. Millions of people have PCV heart beats as well as panic disorder. They can also be entirely seperate but typically go hand in hand because PCV heart beats can cause people to be teriffied that they happen to have this beats. What this does is heightens the persons awarness that they are having the PVCs which fuels their fear to have another episode. This cycle is basically fearing fear itself which is what panic attacks are.
So if your are under a lot of stress I recommend that you try your best to decrease it and exercise is a good way to do that. Good luck!!!