This is not new or particularly interesting. Dick Cheney had one of these for a long time. I knew someone who had one too. I'm not sure why this is being written about as if it's new.
http://www.syncardia.com/medical-professionals/tah-for-medic...
The above seems to be what Cheney was outfitted with.
The syncardia system mentioned in the article appears to be a full heart replacement unit.