Short story.
Real short.
I have a REALLY good internist. REALLY good. Some say the best in KC.
When I first thought I had a problem, I asked him if I should get a body scan. He said no way, those things are a waste of money.
If I had listened to him, I'd be dead now. The blockage was 98% (or more!) in the LAD.. the Widowmaker.
You can put all your faith in a Doc or you can educate yourself.
You go, bhoy. There's TONS of info out there. Read and sift.
Good luck!