That was quick treatment! That's the key though, very quick attention to a heart attack can greatly reduce the risk of further problems. You might well be offered cardiac rehab once you've recovered sufficiently, and if you're a regular cyclist you'll probably find it pretty tame stuff - but I'd urge you to do it, as you'll get your HR and BP checked and recorded at the start and end of every session, and that's important information at that stage.
(I see Dave R beat me to essentially the same thing
)