After a funny weekend I thought I would share this. I slipped down a stairwell on Sat eve and blacked out. My arm caught in the hand rails and stopped me falling further but hurt my elbo - just a slight swelling now). On returning to consciousness I went back to the flat I was in, but I blacked out again, so an ambulance was called. They looked me over and decided that after 2 periods of unconsciousness I should go to A&E. A&E did the usual checks and eventually found I was suffering from Atrial Fibrillation. Basically my heart was speeding up for a few beats then pausing for 1/2 a second while it tried to reset its self. I was kept in overnight in AU ward but later moved to the Cardiac Care Unit ward as the pauses were getting longer. After ~12 hours my heart returned to normal rhythm.
They say 'Google is your friend' - right?
According the the article below AF is 3 times as common in Endurance Athletes as non athletes. I didn't consider myself an endurance athlete but perhaps I'm wrong, and Audax is Endurance? There are two forms of AF, Paroxysmal AF (paroxysmal ~= sudden) and persistent AF. I hope I had the former and that is never returns. Anyway, either can impair your performance by as much as 15%. It made an interesting read, and although I don't like to self diagnose, what is in the following article did make sense following my recent experience.
http://www.endurancecorner.com/Larry_Creswell/atrial_fibrillation