title: [Diurnal rhythm of changes in electrocardiographic indices in health school-age children].
mesh_terms: D000293:Adolescent; D002648:Child; D002940:Circadian Rhythm; D004562:Electrocardiography; D006321:Heart / Q000502:physiology*; D006801:Humans
vernacular_title: Sutochnyĭ ritm izmeneniia élektrokardiograficheskikh pokazatelei u zdorovykh deteĭ shkol'nogo vozrasta.