My left arm went tingly and my left leg bothered me I waited 4 hrs to have an ECG that showed a right Bundle Block. I am 45 male white and excersied three time a week. My heart now feels like it flutters about three-6 times a day. I am still waiting to see a Cardioligist This happen 6 days ago. I do not feel the same as I did 7 days ago.
Probably just aging leads to degeneration of the heart's electrical conduction system. THere is nothing you can specifically do to prevent it from progressing - however, it is very unlikely to progress.