Man’s heart replaced with a pump.
This is an amazing short film (under 3 minutes) which is well worth a watch.
It shows the story of two surgeons who completely remove the heart of a man and replace it with a centrifugal pump. Suffering from Amyloidosis, the man would have died within a day without the procedure, but according to one surgeon, “The following day, he was completely stable” and went home to his wife shortly afterwards.
(Source: singularityhub.com, via 8bitfuture)