Jarvik artificial heart vs Jarvik heart

Jarvik artificial heart and Jarvik heart both are nouns.

Word	Noun	Adjective	Verb	Adverb
Jarvik artificial heart	Yes	No	No	No
Jarvik heart	Yes	No	No	No

As nouns, Jarvik artificial heart and Jarvik heart are synonyms defined as:

Jarvik artificial heart and Jarvik heart: a kind of artificial heart that has been used with some success

Jarvik artificial heart (noun)	Jarvik heart (noun)
a kind of artificial heart that has been used with some success	a kind of artificial heart that has been used with some success