title: Quadricuspid aortic valve: a rare entity.
authors.affiliation: Division of Cardiology, Department of Medicine, Michigan State University, East Lansing, Michigan, USA.
authors.forename: Anand
authors.initials: A
authors.lastname: Cholia
authors.forename: Ronald
authors.initials: R
authors.lastname: Voice
authors.forename: George S
authors.initials: GS
authors.lastname: Abela
mesh_terms: D001021:Aortic Valve / Q000002:abnormalities* / Q000000981:diagnostic imaging; D001022:Aortic Valve Insufficiency / Q000000981:diagnostic imaging; D017548:Echocardiography, Transesophageal; D005260:Female; D006801:Humans; D008875:Middle Aged