Thank you Robert Jarvik!
sentence: I need to get fitted for a prosthesis.
Artificial Heart- is a prosthesis device that is implanted into the body to replace the original biological heart.
sentence: Robert Jarvik invented the artificial heart.
Ventricular assist device- which is implanted to assist the natural leaving the patients heart in place and still functioning.
sentence: There is two types of Artificial hearts that exist, the total artificial heart and the ventricular assist device.