Sotacor mentioned is known by many as Sotalol, just a note for other readers. Strange how I've become more tolerant to physical exertion, but emotions seem to exacerbate my Afib. It all gets back to the AV node that controls the rate of signals passing from the top of the heart to the bottom. For those that can that are more physically fit have a naturally slower rate than those that aren't physically fit. And the AV Node is controlled by the Sympathetic and Parasympathetic Nervous System, so emotions can create the opportunity for a faster rate in people without Afib, governed by the SA Node, but in those of us with Afib, the Afib (fast Atrial Rate) makes it through the AV node more often and symptoms occur.

This still has me obsessed, a life time of periodic assaults by PVCs has made me hyper aware of my heart, I feel every variation (well, most at least) from normal. I had/have the chance to be converted, but reading the literature on Sotalol, something that was going to be used to prevent recurrence, it says only to be used in highly symptomatic patients and I'm not highly symptomatic. One Cardiologist that does ablation for Afib got to experience it for himself, and though he converted pharmacologically, he said some people have mild Afib and horrible symptoms and others have horrible afib and mild symptoms, he said it's an enigma, just unpredictable. Ugh.