. >>> well, eibel back at the top of the hour for "cnn sunday morning" at 8:00 a.m. eastern time. but first sanjay gupta m.d. begins right now. >>> everywhere you look it seems a heart attack is waiting to happen. more than a million heart attacks a year. that's one just about every second in the united states. if you haven't had a heart attack yourself you likely know someone who has. i've got a secret to share, with what we know right now we could see the last heart attack. things you need to know. things your doctor may not tell you. i'm a pretty typical guy in his early 40s with family heft of heart disease so i decided to go on a mission to never have a heart attack. but how? dr. arthur a fw otson guarantees he can see things coming years in advance. here's where the blood is flowing. >> he's look for plaque in the carrotic artery. a blockage here can cause a stroke and would be a sign i'm at increased risk for a heart attack. >> unless you do the imaging and the advanced testing, you are really playing russian roulette with your life. >> what are you looking for? >> calcium.