A "one off"?
Last year, while in training for a marathon, I got up at about 3 am to make my wife and myself a hot chocolate. (yes, I'm good that way.) I started to feel faint, and got down on all fours to avoid keeling over. Managed to get to bed, and told my wife I wasn't feeling too good. She got out the monitor, and it gave a BP reading of 68/40, with a HR of 31. I'm usually about 130/80 and HR of 50. I persuaded her not to call an ambulance, and eventually went to sleep. The next day I felt tired, but 36 hours after the episode I ran ten miles, and in the following month completed two half marathons. Naturally, a visit to the cardiologist was made (it takes a while to see a specialist in UK, and anyway I was by now feeling fine), and he set up a whole battery of tests. I had both a resting and stress ECG, 48hr BP monitor, Aortic Echogram, Cardiac Echogram and contrast MRI on the heart. There were a few minor irregularities but he wasn't concerned about them other than to warn me that marathons might not be a good idea. When I pressed him for the cause of the "collapse" he admitted that he didn't know, and said it was just a "vascular event". Could be you suffered something similar, and no definite cause will be found. Good luck, and keep us posted.
Last edited by Herod; 14th March 2012 at 15:08.