It was diagnosed by a cardiologist. He told me that he used to get it too when he was training for marathons and as soon as he became less fit it never happened again. He told me not to worry about it and that it was something alot of fit people get and that it may never happen again but to monitor it. It hasn't ever happened to the degree it happened that first time. Now when i feel it, it is irregular for a very short interval and then returns to normal. I appreciate your replies but i'm really looking for an answer as to whether this is going to cause me to lose my CASA medical. I know this can be managed entirely effectively with Sotalol (approved for pilots) yet if i go and get a prescriptuon for it i have to tell CASA and want to know if they will cancel my licence due to this????