I am 28 years old with decent blood pressure and borderline cholesterol. My dad had a quad CABG, with a 90,80,80,60 at 54. His brother died of a heart attack at 41. Their father had a quad CABG in his late 60's. My other grandfather had CHD in his 70's. I grew up in fast food nation, and I am from the south, so i've been eating crisco and chicken nuggets all my life. I smoked from 16-25 recreationally but no more. I had an echo done, and ran a stress test, and it showed nothing. Obviously, I am a very high risk person. Do I have clogged arteries already? What does the echo and stress test really rule out. I've been told that they can detect nothing, even though something exists.