Hi, my name is Dr. Warrick Bishop and I'd like to welcome you to my consulting room. I'd like to speak with you today about two cases I've had in the last couple of weeks who've really reminded me of the difficulty we sometimes have in predicting who's going to have a heart attack. Both these cases were emergency workers. Both of these cases were men. The first man was just over 50 years of age. He was fit and he was well. In fact, if you walk past him on the street you would pick him as someone who looked after himself and exercises regularly which he did.