>> you see the little wire mesh like one of those chinese handcuffs, that's what it looks like although it's very tiny. >> it stays in your heart forever. >> it becomes part of your artery. >> in 2004, he had four blockages. how rare is it to clean out those blockages and then have to go back in and put a stent to keep the walls open? >> you don't really clean out the blockages. what you do is you reroute the plumbing. you use an artery from the chest wall or one from -- a vein from the leg and you bypass the obstruction. so you always have the risk of developing more heart disease. that's why after somebody has bypass surgery or stents, we tell them to exercise, change their diet and give them cholesterol medicines and aspirin. although we always hope that we reduce the risk, we have to remember that it's not always 100%. >> you think this is a lifestyle issue? >> no, it sounds like he was following a good and healthy lifestyle and i know that everyone is saying that he's been traveling around doing good. i think if you're used to doing that, that doesn't really impose

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