title: Mitral valve dysplasia characterized by isolated cleft of the anterior leaflet resulting in fixed left ventricular outflow tract obstruction.
abstract: A 7-month-old, sexually intact male English toy spaniel weighing 4 kg was referred for evaluation of a subclinical cardiac murmur. Echocardiography disclosed fixed left ventricular outflow tract obstruction that was caused by attachment of a cleft anterior mitral valve leaflet to the interventricular septum. Neither atrial nor ventricular septal defects were detected. Fixed obstruction of the left ventricular outflow tract by a malformed mitral valve is rare in human beings and has not been previously reported in the dog.
authors.affiliation: Department of Small Animal Clinical Sciences, Virginia Maryland Regional College of Veterinary Medicine, Virginia Tech, Blacksburg, VA 24061-0442, USA.
authors.forename: Cristiane
authors.initials: C
authors.lastname: Otoni
authors.forename: Jonathan A
authors.initials: JA
authors.lastname: Abbott
mesh_terms: D000818:Animals; D004283:Dog Diseases / Q000473:pathology*; D004285:Dogs; D006352:Heart Ventricles; D008297:Male; D008944:Mitral Valve Insufficiency / Q000151:congenital / Q000473:pathology / Q000662:veterinary*; D014694:Ventricular Outflow Obstruction / Q000473:pathology / Q000662:veterinary*