Hi Joanne,
Here are my two cents: I have mitral valve repair surgery in January 2021 with a Maze procedure (ablation) for afib. I only had one afib attack in my life just before the surgery and never again since.
However, in September of 2021 I started to have irregular heartbeat issues, mostly PVC's. I took Metoprolol in various dozes, twice a day 25 mg; then just once before I went to bed; then increased it, then I decreased it until I got sick and tired of the whole thing and after clearing it with an electrophysiologist, I completely stopped taking it.
The PVC's are almost non-existent now; I may have one here and there. The electrophysiologist could not give an explanation as to why this happened. He said it was coincidence, but who knows.
I am not suggesting to do the same thing but you may ask your doctor about it.
Good luck and stay safe!