title: Progressive familial heart block. Part II. Clinical and ECG confirmation of progression--report on 4 cases.
abstract: Two types of progressive familial heart block controlled by a single gene have been described; 4 cases show that type I is progressive and that the pathogenesis is still unknown.
mesh_terms: D000328:Adult; D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography; D005260:Female; D006327:Heart Block / Q000175:diagnosis / Q000235:genetics* / Q000628:therapy; D006801:Humans; D007223:Infant; D008297:Male; D010138:Pacemaker, Artificial; D013019:South Africa