of pushing, okay? >> she's been fighting rejection for several years now. pediatric cardiologist seth hollander goes to stacy. >> compared to 2008 to now we're starting to see kind of a slow progression of the coronary problem. and that's not really something that's reversible. >> right. >> the real question to be perfectly honest, i don't mean to sort of jump on you, is whether or not it's time to start thinking about transplant number 2. >> stacy's gut feeling was right. >> your pressure number's a little bit up again. did they tell you? >> yeah. >> and i think oh, my goodness, how many kids, how many times? you get that feeling of impending doom like it's never going to end, it's just on repeat. >> yeah. >> transplanted hearts for reasons we don't fully understand don't last forever. so if you're an older person who's getting a transplant, you may be able to live out the natural duration of your life before your transplanted heart gives out. but fwe didn't transplant sierra at age of 7 years old to get her