Gradual progression of first degree atrioventricular block to complete atrioventricular block in childhood.
D000293:Adolescent; D006328:Cardiac Catheterization; D004562:Electrocardiography; D005260:Female; D006327:Heart Block / Q000000981:diagnostic imaging / Q000209:etiology / Q000503:physiopathology*; D006339:Heart Rate; D006801:Humans; D011859:Radiography; D013997:Time Factors