Pathological basis of primary heart block.
D000375:Aging; D004719:Endomyocardial Fibrosis / Q000209:etiology / Q000473:pathology; D006327:Heart Block / Q000209:etiology* / Q000473:pathology*; D006329:Heart Conduction System / Q000473:pathology; D006801:Humans; D009205:Myocarditis / Q000150:complications; D009206:Myocardium / Q000473:pathology