Anomalous mitral valve arcade is diagnosed based on the following features (1) An adequately sized mitral valve orifice; (2) short, thick, and poorly differentiated chordae with direct union of the papillary muscles to the anterior leaflet; (3) narrow or nearly nonexistent spaces between the abnormal chordae; and (4) greater differentiation of the chordae attached to the posterior papillary muscle. [from HPO]

Diagnosis