title: Notching of the QRS complex in high frequency electrocardiograms of normal children and in children with rheumatic fever.
mesh_terms: D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography; D007839:Functional Laterality; D006321:Heart / Q000502:physiology / Q000503:physiopathology*; D006330:Heart Defects, Congenital / Q000503:physiopathology; D006801:Humans; D009205:Myocarditis / Q000503:physiopathology; D012213:Rheumatic Fever / Q000503:physiopathology*; D013997:Time Factors