title: [Usefulness of 3 orthogonal ECG leads in healthy children and children with heart diseases as compared with 12 conventional leads].
mesh_terms: D000293:Adolescent; D000367:Age Factors; D001145:Arrhythmias, Cardiac / Q000175:diagnosis; D002648:Child; D002675:Child, Preschool; D003201:Computers; D004562:Electrocardiography / Q000295:instrumentation*; D006331:Heart Diseases / Q000175:diagnosis*; D006349:Heart Valve Diseases / Q000175:diagnosis; D006801:Humans
vernacular_title: Badania nad przydatnościa 3 odprowadzeń ortogonalnych EKG u dzieci zdrowych i z chorobami serca w porównaniu z 12 odprowadzeniami konwencjonalnymi