I don't know what happened to you when you had your fit, but I myself had what was described at the time as a fit. What happened in my case was I sort of blanked out at work, I remember leaving the canteen at 9.30am, then the next thing I knew was a Paramedic shining a torch in my eyes, and it was 11am. I was apparently still doing my job, although not to my usual standard, and I was wearing my safety vest under my coat instead of over. Also I worked in a chilled warehouse, and at one stage I only had my T shirt on my top half, apparently I kept my trousers on. Any way looked shocking enough for the Gaffer to phone for an ambulance, I had a heart rate of 150bpm, and was also suffering from an abnormal heart rhythm, which they (Docs) call AF. I was told later by several people that saw me, that I was grey in colour. When my wife arrived I failed to recognise her at first, and I spent the night on a cardio unit. To this day I have not been told what might have caused it, the Cardiologist says it was not my heart, it must be the Brain. The Neurologist says it is not the Brain it is the heart, catch 22.
Incidently I am going to see the cardiologist on Monday, I have in the past year had two what they call Cardio versions. They put you to sleep, attach you to some of those electric pads you see so often on Casulty or Holby city, and give you a few jolts, that briefly stop and then start up the heart again, hopefully in a normal rhythm. As you have worked out by now, both of my goes worked for about two days then reverted back to AF.
Any way I hope you fair better than I did,and if you get any one to say it might have been your PD, write it all down and post it to the PDS.
ALL THE BEST MATE