I googled CBD and afib, and a couple of studies came up. You might do the same. I made copies for my cardiologist but he got impatient that no major studies had been done etc,, but as long as I stayed on Eliquis and Dofetilide I could add the CBD if I wanted too. (No, not a Mayo Dr.). Yes, I put a CBD creme on my thumbs and sometimes legs. Heart seems to be more stable, but hard to judge.