title: Phonocardiographic study of the duration of the first heart sound and its relationship with systolic murmurs.
authors.forename: F
authors.initials: F
authors.lastname: BARRERA CANEDO
mesh_terms: D006321:Heart; D006337:Heart Murmurs; D006801:Humans; D013016:Sound
keywords: HEART/murmurs and sounds
vernacular_title: Estudio fonocardiográfico de la duración del primer ruido cardäaco y sus relaciones con los soplos sistólicos.