title: Anomalous papillary muscle producing dynamic left ventricular outflow tract obstruction.
abstract: A patient with a dynamic left ventricular outflow murmur was shown to have an anomalous anterolateral papillary muscle by transthoracic and transesophageal two-dimensional Doppler echocardiography. High late systolic outflow velocity and systolic anterior motion were demonstrated in the lateral outflow tract near the anomalous muscle, suggesting a role for the Venturi effect. This is the first confirmation by Doppler echocardiography of an anomalous papillary muscle contributing to abnormal left ventricular hemodynamics.
authors.affiliation: Cardiology Section, Veterans Administration Hospital, Albuquerque, NM 87108.
authors.forename: C A
authors.initials: CA
authors.lastname: Roldan
authors.forename: F T
authors.initials: FT
authors.lastname: Gurule
authors.forename: B K
authors.initials: BK
authors.lastname: Shively
mesh_terms: D000328:Adult; D002302:Cardiac Output / Q000502:physiology; D002306:Cardiac Volume / Q000502:physiology; D004452:Echocardiography; D015150:Echocardiography, Doppler; D006801:Humans; D008297:Male; D010210:Papillary Muscles / Q000002:abnormalities* / Q000000981:diagnostic imaging; D013599:Systole / Q000502:physiology; D016277:Ventricular Function, Left / Q000502:physiology; D014694:Ventricular Outflow Obstruction / Q000000981:diagnostic imaging / Q000209:etiology*