The Artificial Heart
From: Medical Design Technology - 08/19/2015

As with many other medical device milestones, the first “artificial heart”
was tested on an animal - in this case, a dog. A pioneer in organ
transplantation, Soviet scientist Vladimir Demikhov was the first to implant
one in 1937.

Read the brief history at:
http://www.mdtmag.com/blogs/2015/08/medtech-memoirs-artificial-heart