The striking finding is marked right ventricular hypertrophy with two well defined muscle bundles, the higher one being very likely nonobstructive. The lower one is comparable to the so-called moderator band. Moderator band is present in every heart, but sometimes difficult to identify. Under some circumstances, it may hypertrophy and cause obstruction.
Moderator bands are very prominent in birds.
In the moderator band runs the right bundle. Consequently, both muscle bundles were nonobstructive.