Type

Right ventricle

Tricuspid valve

A

Small contractile atrialized right ventricle. Adequate-size right ventricle

Moderate displacement of septal and posterior leaflets. Normal anterior leaflet.

B

Large noncontractile atrialized right ventricle. Small right ventricle

Marked displacement of septal and posterior leaflets. Hypoplastic adherent septal leaflet. Normal anterior leaflet.

C

Large noncontractile atrialized right ventricle. Very small right ventricle

Marked displacement of septal and posterior leaflets. Hypolastic adherent septal and posterior leaflets. Restricted anterior leaflet motion.

D

Almost completely noncontractile atrialized right ventricle (except for infundibulum)

Marked displacement of septal, posterior and anterior leaflets. Hypoplastic adherent septal and posterior leaflets. Anterior leaflet is adherent to ventricular wall.