Strangely, I bumped into the bloke in a bar in Vancouver a week later, right as rain, happily and he hadn't had a heart attack. He said the Medical Facilities in Yellowknife were absolutely state of the art and if you were ever taken ill on a plane, that was the place to go!
A friend was telling me the other day about doctors in Yellowknife. Apparently they get paid an absolute fortune to go there, because no one really wants to live in Yellowknife all year. So, most doctors will go there for a few years, save a load of money, and then return to civilisation.