Well, count me in as a member of the AFib club. It was 15 years ago (age 37) and the doctors never figured out what triggered it but I did. Nothing like a huge dose of chocolate Easter candy along with a LOT of Michelob Lights to get the ticker out of rhytm. It also happened just 2 weeks after my last child was born-had my wife worried sick. My heart rate was in the 160's and I'd have to grab a wall while I was standing up to keep from keeling over as every once in a while I'd get very dizzy.

The good news was the heart cath showed very clear arteries. I've been taking calcium blockers ever since and have not had any repeat occurrences. I quit caffeinated drinks-no tea or soft drinks- but still hit the chocolate pretty heavy.

All of this was before I started riding just 3 years ago, though. I couldn't imagine riding while have a bout with AFib.

I would think that would be asking for trouble--potentially a bad stroke........