abnormal mitral valve morphology Fyler:1508 MP:0000286 MPheno.ontology abnormal bicuspid valve morphology abnormal mitral valvar morphology any structural anomaly of the valve between the left atrium and the left ventricle of the heart, and contains two cusps, the anterior cusp and the posterior cusp, attached to the outer fibrous ring (annulus) mitral valve dysplasia abnormal atrioventricular valve morphology