When I was a teenager there was a novel adapted for TV by the BBC called “Pig Heart Boy”. It explored the emotional impact of this type of procedure on a teenager and the response from the public, both good and bad. I don’t remember much about it but it looks like it won a BAFTA.
Yeah when I read the title of this article my first thought was 'isnt that a thing, why is it news'. Then I realised that its not very common and I was just thinking of the book/TV show!
https://en.m.wikipedia.org/wiki/Pig_Heart_Boy