Of course, start with reducing caffeine, alcohol
I've read that omega 3 fish oil, potassium, magnesium and
taurine all play a part in heart rhythm so I am researching those nutritional remedies as well as herbs.
As far as I know, there's no cure for PACs/PVCs, so all we can do is try to control them. If there was a magic pill out there, we would probably know by now, so in the meantime, ask your doc about food and/or supplement options.