I sometimes suffer from PVCs, mostly in a regular pattern : bi or tri geminal.
They can last for hours, but less so since I've decided to eat less calcium.
I've still PVCs from time to time, they're annoying, but never lead to AFib for me.
I don't know whether they can be ablated or not, but my understanding is one has to enter the ventricles via mitral or tricuspid valves. Makes me nervous!