title: [Ultrasonocardiographic studies of healthy children aged 1-7 years].
mesh_terms: D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004452:Echocardiography / Q000379:methods*; D005260:Female; D006321:Heart / Q000502:physiology*; D006801:Humans; D008297:Male
vernacular_title: Badania ultrasokokardiograficzne u zdrowych dzieci od 1 roku do 7 lat.