title: Accessory mitral valve leaflet causing aortic regurgitation and left ventricular outflow tract obstruction. Case report and review of published reports.
abstract: Arrhythmias, aortic regurgitation, and symptoms of severe intermittent ventricular outflow obstruction developed in a 14 year old boy with a heart murmur who had been followed from infancy. These were caused by an accessory mitral leaflet, which was successfully removed at open heart operation. A review of 21 previously reported cases found a high incidence of associated cardiac malformations, appreciable subaortic obstruction in most patients, and a consistent attachment of the accessory tissue to the ventricular aspect of the anterior mitral leaflet. The characteristic echocardiographic appearance of a mobile mass arising from the area of aortic-mitral continuity is sufficient for the diagnosis of accessory mitral leaflet and echocardiographic examination will facilitate the surgical management of this condition.
authors.affiliation: Royal Liverpool Children's Hospital.
authors.forename: J
authors.initials: J
authors.lastname: Sono
authors.forename: R
authors.initials: R
authors.lastname: McKay
authors.forename: R M
authors.initials: RM
authors.lastname: Arnold
mesh_terms: D000293:Adolescent; D001022:Aortic Valve Insufficiency / Q000209:etiology*; D004452:Echocardiography; D006801:Humans; D008297:Male; D008943:Mitral Valve / Q000002:abnormalities*; D014694:Ventricular Outflow Obstruction / Q000209:etiology*