the good news== Atrial fibrillation is a very common problem in the general population, especially elderly, with lots of effective treatment options
http://en.wikipedia.org/wiki/Managem...l_fibrillation
the even better news---I believe they are now finding one can still have MRIs even after having a pacemaker implanted. Ask specifically about that when/if they suggest a pacemaker as an inability to undergo an MRI could be problematic later in your bc care and expose you to a lot more radiation, Used to be they told those with pacemakers they could never again get an MRI
one caveat--they may want to "fix" your AF with pacemaker or ablation sooner rather than later IF they determine your AF might place you at risk for a stroke as they probably don't want to put you on blood thinners while you are on PTH. Really don't know enough about your AF, PTH protocol effect on platelets, etc to comment (and it is certainly not an area I know much about) further. Just something to think about.