A rare form of cyanotic congenital heart malformation characterized by severe cyanosis and tachypnea. It presents significant morphologic diversity: at the end of the spectrum are patients with a mildly hypoplastic and tripartite right ventricle (RV) and mild tricuspid valve (TV) hypoplasia, and at the other end are patients with severe RV and TV hypoplasia, often with RV-dependent coronary circulation. [from
ORDO]