title: [Phonocardiographic formula for determining the degree of regurgitation in combined mitral valve defects].
mesh_terms: D006328:Cardiac Catheterization; D006339:Heart Rate; D006801:Humans; D008433:Mathematics; D008944:Mitral Valve Insufficiency / Q000175:diagnosis* / Q000601:surgery; D008946:Mitral Valve Stenosis / Q000175:diagnosis; D010701:Phonocardiography
vernacular_title: Fonokardiograficheskaia formula dlia opredeleniia stepeni regurgitatsii pri kombinirovannykh porokakh mitral'nogo klapana.