Obstruction of the left ventricular outflow tract by the mitral valve due to a muscle band.
This paper details a rare cause of subaortic obstruction--a muscle band tethering the anterior leaflet of the mitral valve to the ventricular septum. Excision of this band released the leaflet and cured the obstruction. The patient also had a discrete subaortic membranous obstruction, the membrane being excised.
D001020:Aortic Stenosis, Subvalvular / Q000209:etiology* / Q000601:surgery; D002312:Cardiomyopathy, Hypertrophic / Q000209:etiology*; D002648:Child; D006801:Humans; D008297:Male; D008943:Mitral Valve / Q000002:abnormalities* / Q000601:surgery