Most transplant centers would not transplant her heart into a recipient because of Griffin's cystic fibrosis, but doctors at Stanford found a way to use Griffin's heart.
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They performed a “domino surgery” where Griffin’s heart was given to Karr and Griffin received the deceased donor’s organs.
Six weeks after the surgery, the two met face-to-face, with Griffin saying "Even though we were strangers before today, you'll always be part of me."
"It was only these unique circumstances of these three people's lives that converged. I think it was kind of a miracle," Karr told KTVX.
“It’s exciting because I’m still alive and know that my heart is out there still,” Griffin said.
Thanks to Griffin, Karr is able to be active in sports. She recently went hiking and realized Griffin's heart beating in her chest was allowing her to do that, KTVX reported. She also competed in the Transplant Games in Salt Lake City, Utah, with biking and basketball among the sports.
Griffin is also leading an active life, taking part in the Crater Walk that stretches 6.7 miles.