title: Variations of the area and shape of the left atrioventricular valve and its cusps and leaflets.
abstract: Measurement of the areas of the cusps and leaflets of the left atrioventricular valve (LAV) and a study of their shape were performed in 91 normal human hearts, to assess the range of variation and determine the most frequent morphologic pattern. The average areas were as follows: LAV, 904.9 mm2; anterior cusp, 447 mm2; posterior cusp, 457 mm2; anterolateral leaflet, 118.6 mm2; intermediate leaflet, 212.7 mm2; and posteromedial leaflet, 126 mm2. The commonest shape of the leaflets of the posterior cusp, proved to be rectangular.
authors.affiliation: Department of Anatomy, Faculty of Health Sciences, University of Brasil, Cidade Universitaria, Brasilia, DF.
authors.forename: A J
authors.initials: AJ
authors.lastname: Bezerra
authors.forename: L J
authors.initials: LJ
authors.lastname: DiDio
authors.forename: J C
authors.initials: JC
authors.lastname: Prates
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002102:Cadaver; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000033:anatomy & histology*