Ok, were talking here about PAC's or are we confusing with PVC's. I was told that PVC's are benign, so long as your heart is healthy. I was told PAC's on the other hand are not. Someone please help me on this. PAC's are what lead to Afib. If I get PAC's they always lead to an onset of Afib. Not so with PVC's which have seemed to gone away, since I was taken off of Metropolol.