title: ECG changes in children with Noonan's syndrome.
mesh_terms: D000293:Adolescent; D001145:Arrhythmias, Cardiac / Q000209:etiology*; D006332:Cardiomegaly / Q000175:diagnosis; D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography; D006327:Heart Block / Q000209:etiology; D006330:Heart Defects, Congenital / Q000150:complications* / Q000175:diagnosis; D006801:Humans; D007223:Infant; D008297:Male; D011666:Pulmonary Valve Stenosis / Q000175:diagnosis; D012729:Sex Chromosome Aberrations / Q000150:complications*