Hope all went well mate.
The thing is with blockages in the heart muscle arteries they sneak up on you over a long time. You might not even know about them until they are like 95% blocked.
If you get warning signs then great, dont ignore them and you get a chance to get checked out. Not everyone gets the chance.
I was noticing something wrong and ended up with a stent put in, that was a few years ago now. Blood pressure and cholesterol are all good now and I have a stress test each year.
We are aging males and that makes us the number one candidates.