Been there, done it and got the T-shirt, the heart attack that is, not Alvin Stardust.

I must say I was a bit annoyed when I had it as i like to think I'm a little fitter than the average 52 year old (at the time). I had done the Frankfurt marathon the previous October and had just got back from a skiing holiday. I wasn't aware of a family history of heart problems at the time.
I had a stent fitted and watched on the screen as the surgeons' did their job, all pretty cool whilst dosed up on morphine.
I stopped taking the myriad of pills they gave me about a year after as I kept getting cramps in all sorts of places.
5 years later I'm still playing football and remain quite active. I have lost about 15kg in weight as well, also cut down the booze, wine and spirits, save the odd tipple or two.