Ebstein anomaly of the tricuspid valve (HP_0010316) can be described as follows. Ebstein's anomaly refers to an abnormally placed and deformed tricuspid valve characterized by apical displacement of the septal and posterior tricuspid valve leaflets, leading to atrialization of the right ventricle with a variable degree of malformation and displacement of the anterior leaflet. Also known as: Ebstein's anomaly, Ebstein's anomaly of the tricuspid valve, Ebstein's malformation.