title: Spectral energy of the first heart sound in relation to mitral valve size parameter.
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D004452:Echocardiography; D005260:Female; D006326:Heart Auscultation; D006347:Heart Sounds; D006801:Humans; D008297:Male; D008943:Mitral Valve / Q000033:anatomy & histology*; D008955:Models, Cardiovascular; D010701:Phonocardiography