title: The heart in normal infants and children; incidence of precordial systolic murmurs and fluoroscopic and electrocardiographic studies.
mesh_terms: D002648:Child; D004562:Electrocardiography; D006321:Heart; D006337:Heart Murmurs; D006801:Humans; D015994:Incidence; D007223:Infant; D054160:Systolic Murmurs
keywords: HEART/murmurs and sounds