[Electrocardiogram of the V3R-V6R leads in healthy children of pre-school age].
D002675:Child, Preschool; D004562:Electrocardiography; D006321:Heart / Q000502:physiology*; D006801:Humans; D014455:Ukraine
Elektrokardiohrama u vidvedenniakh V3R-V6R u zdorovykh diteĭ doshkil'noho viku.