[The duration of the systole of the heart and its components in healthy children].
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D006321:Heart / Q000502:physiology*; D006801:Humans; D010701:Phonocardiography
Prodolzhitel'nost' sistoly serdtsa i ee komponentov u zdorovykh deteĭ.