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Angiogram. there is new way to see if there is blockage. once they found the blockage they put a catheter through an artery in the groin this morning, fed it up to the heart and put a balloon in and dilated the part of the artery that was closed. they put a stent in. jenna: i'm curious what a stent look like. sometimes we show animation. you actually have one you have permission to use outside after procedure. >> even though it is expensive they want to show it on tva stent is really tiny. you feed it up into the attar terry an leave it in there to keep the artery open. i will open it. jenna: ...

Operation, any invasive procedure is going to be taken seriously and there are potential risks to that operation and that procedure and there are potential risks down the line as well. basically what happens here is, you know, pretty simple plumbing, betty. i don't want to trivialize this. i think you might be looking at some animation. you put these metal scaffoldings into the artery and open up those areas that are blocked and those stents stay in the blood vessel and hold that artery open, allowing enough blood to get to the heart. there have been some concerns that over time you could caus...

Over there and then just days later these chest pains were not very strong at all. and then they got worse. you have talked to him? >> i haven't talked to him. i'm not going to try to talk to him. i'm sure he needs rest. i might try to call my friend doug band when things quiet down to get a first-hand report. look, he has what most people after bypass operations, is my understanding, talking to some doctors today, experienced. which is some coagulation and a need for a stent. all the stent is for all yours viewers is a contraption that keeps the artery open. it's quite common. i'm praying for...

Angiography. again, he did not have a heart attack or any damage to his heart. the pictures were taken of the arteries that supply blood to the heart and of the four bypass graphs he had six years ago. one of the bypass graphs was completely blocked. because of that and the fact he was having repetitive symptoms at rest he was treated with two stents that were placed into his own coronary artery. that is the artery that had been supplied previously by his bypass was open by the placement of two stents. metal scaffolds that hold the artery open. the procedure went very smoothly. president clint...

Sense of it than to say bill clinton was the same old bill clinton. >> he had two stents put into a, what, a coronary artery? i know we have an animation of that. describe what the procedure is. >> i don't want to belittle this at all but basically it's plumbing. you have blood vessels that provide blood to the heart. in in this case the heart wasn't getting enough oxygenated blood. in this case, you know, he's had the bypass before as we were talking about, anderson. actually put -- bypass the blockages. here actually putting a stent in to hold the artery open. just allow more blood flow. >> ...