New device helps kids with heart defects like Jimmy Kimmel's son

After Jimmy Kimmel's discussions about his son's health put congenital heart defects into the spotlight, Dr. Ashton discusses new treatment methods that are giving families hope.
4:33 | 07/06/18

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Transcript for New device helps kids with heart defects like Jimmy Kimmel's son
A new cutti edge dice is VI hope to thousands of children Sr from heart cts like whatmy ki's son Billy had. You meer of cour Billy hadopen heart surgery at 3 day old. Could make it a thing of the past. Eva pilgrim has more. I H a story to tell about someth that HAPD to our family last we Rorter: This funnyman rarely gets choked up on his night comedy show "Jimmy Kimmel live" buthe his baby boy was sick Jimmy got emotnal. So this poor kid is W he looked like O Monday. Reporter: Bilas born with a heart ion and at just 3 ys old had open heart surge are I to repr it. 7 monthsater after a second art surgery, jimmyht Billy to work. Addy cries on TV but Billy doesn't. It's unbelievable. Reporter: Billy will need re repair worone on his heart but nowre is a new technology thaepair the hearts kids like Billy less invasively ??????17r-old Matt was born with the same heart defect as Billy Kimmel. He had two surgeries whenwas little. So when his heart started giving hiouble two years ago, he says the prospects of another open heart surge was petrifying. I faced and death tuations. If I had to that again I don't know if could. Son heart surgery is long procedure. Veinvasive procedure. Uallyequires about a week or mor in the hospital recovery. So here W go. Rter: This doctor from the children'spil of philadelphiapsids with heart defects like Billy's avoid heart surgery by using the harmony vaigned especially for tiny patients now in trials at a few U.S. Hospitals. It's put in through a cter D slid into position in the heart alle through small inci in the groin. 'Re png a V I without having to go innd open up there and sew it in all done tgh catheters and engine to in that poon. Reporter: Mac's valve surgery wasus. Hi hospital stayhortest it's ever been. Het like a million dollars. Like that never happenst was amazing. I went home and iust chilled outike it was a regular day. Rorter: Givg hope to MM and his as well. "Good morning America," Eva pilgrim, ABC news, New York. And those are suchappy endings we arenkful for. Dr. Jenni Ashton joins us now. Do we know what causes these coions in babies? We don't WHA we do know this is most common type of congenital birth defece see. It could bprm with T chambers of the heart, the major vessels or the valves and that's because when theeart forms in O it has to fold into just right W so if you imagine theselloons, they're all red balloon, they're all folded but if they foldncorrectly you wind up with a problemithhe aorta or a cha or the valve anat's why it's so long. Ther aong list of heart des. Some are critical and life-threatening and other may ne Tse party hearts in the bean is the size of a walnut. What parents be on the look for. Moshee these are picked in a 20-week O 22-week prenatal ultras. Sometimes 'rot detected until the delivery room. Signs or symptoms depending on W type of congenital heart defect it you might see discoloration around L or coloring even I dark babies see a pale color in the nailbeds. Rapid bring. Swelling in the leg,bdomen or around the eyes and shortness of eath during feedings that leads to poor weight gain. Older children it mig N treaty unless they're having problems in sports but M of the time T are picked up pretty soon. His new breakthrough that we're talking about could mean end of open heart er Right. Well, again, there a so many heartdefects. Most do require er many of them staged or sequen operations B if you imagine this clear tubes the what we're seeing W this valve is the yello ulla gets place through the groin, it goes allheay up to the right side ohe heart. It finds its proper place and then it's deployed sparing that baby aracked chest and open sternum sohat's a big deal. Not for every type of defect but for those it makes a difference. T you. Not bad luck in this ce T open an umbre indoors.

This transcript has been automatically generated and may not be 100% accurate.

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