A Medline search in January 2008 of articles published since 1950 revealed seven articles on<unk> " (in the earlier part of this period only the titles could be searched), of which only one was in English. A search for dictionary-reported synonyms revealed no mention of "bucardia," and all 101 articles mentioning "ox heart" related to oxen.
Cor bovinum
Airtraq
Ainhum
Boracic lint
Hippus
Phrygian cap 
Diaphragm 
Adina