Synonyms for Atrioventricular trunk:

n.

Atrioventricular Bundle (noun)
bundle of his.
atrioventricular trunk (noun)
Atrioventricular Bundle, bundle of his, Truncus Atrioventricularis.

Other synonyms:

bundle of His
bundle of his.
truncus atrioventricularis
Truncus Atrioventricularis.