Birder, while in the hospital after surgery I realized my heart was beating fast, an odd feeling. Well, it was atrial fibulation, a disturbance in the sinus rhythm that keeps the heart going at a good pace. It was swiftly treated. My father had atrial fibulation in his 80s and there’s medication for it, not that I’m diagnosing you, though I doubt it’s the vest doing it. Your doctor should know and might order an echo caridogram. You’re wise to see him because there are treatments for AF should that be the case. Good luck. I know none of us need anything else to worry about! Please keep us posted.