title: Abnormally thickened papillary muscle resulting in dynamic left ventricular outflow tract obstruction: an unusual presentation of hypertrophic cardiomyopathy.
abstract: We report the case of a symptomatic 18-year-old patient, gene-positive for hypertrophic cardiomyopathy (HCM), who presented with symptomatic dynamic left ventricular outflow tract (LVOT) obstruction caused by an abnormally thickened papillary muscle in the absence of septal hypertrophy. This was confirmed using multimodality imaging, including echocardiography and magnetic resonance imaging. He successfully underwent surgery for papillary muscle realignment without septal myectomy.
authors.affiliation: Department of Cardiovascular Medicine, Heart and Vascular Institute, Cleveland Clinic, Cleveland, OH 44195, USA.
authors.forename: Bethany A
authors.initials: BA
authors.lastname: Austin
authors.forename: Deborah H
authors.initials: DH
authors.lastname: Kwon
authors.forename: Nicholas G
authors.initials: NG
authors.lastname: Smedira
authors.forename: Maran
authors.initials: M
authors.lastname: Thamilarasan
authors.forename: Harry M
authors.initials: HM
authors.lastname: Lever
authors.forename: Milind Y
authors.initials: MY
authors.lastname: Desai
mesh_terms: D009202:Cardiomyopathies / Q000150:complications* / Q000000981:diagnostic imaging*; D002312:Cardiomyopathy, Hypertrophic / Q000150:complications* / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D010210:Papillary Muscles / Q000000981:diagnostic imaging*; D035583:Rare Diseases; D014463:Ultrasonography; D014694:Ventricular Outflow Obstruction / Q000150:complications* / Q000000981:diagnostic imaging*