title: A quadricuspid aortic valve causing moderate aortic regurgitation.
abstract: Quadricuspid aortic valve (QAV) is a rare cause of aortic regurgitation. Most cases are  detected incidentally during echocardiography, angiography, autopsy or surgery. It may also be  associated with other congenital anomalies of the heart. A 70 year-old man was admitted to  our hospital with a five-month history of dyspnea. Echocardiographic examination showed  a QAV leading to moderate aortic regurgitation, severe mitral regurgitation, left ventricular  dysfunction and aortic root dilatation. Surgical treatment was considered, but the patient refused.  We describe a case of QAV leading to aortic regurgitation.
authors.affiliation: Department of Cardiology, Ataturk University, Erzurum, Turkey. eftalka@yahoo.com
authors.forename: Eftal Murat
authors.initials: EM
authors.lastname: Bakirci
authors.forename: Sakir
authors.initials: S
authors.lastname: Arslan
authors.forename: Husnu
authors.initials: H
authors.lastname: Degirmenci
authors.forename: Serdar
authors.initials: S
authors.lastname: Sevimli
mesh_terms: D000368:Aged; D001021:Aortic Valve / Q000002:abnormalities* / Q000000981:diagnostic imaging; D001022:Aortic Valve Insufficiency / Q000150:complications / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000209:etiology*; D004417:Dyspnea / Q000209:etiology; D019560:Echocardiography, Three-Dimensional; D017548:Echocardiography, Transesophageal; D006801:Humans; D008297:Male; D008944:Mitral Valve Insufficiency / Q000150:complications / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000209:etiology*; D016312:Treatment Refusal