title: [Phase analysis of the cardiac activity of school children from the lower altitudes of Kirghizia].
mesh_terms: D000293:Adolescent; D000367:Age Factors; D000531:Altitude; D002648:Child; D005260:Female; D006321:Heart / Q000502:physiology*; D006334:Heart Function Tests; D006801:Humans; D007707:Kyrgyzstan; D008297:Male
vernacular_title: Fazovyĭ analiz serdechnoĭ dieatel'nosti shkol'nikov nizkogor'ia Kirgizii.