title: Advanced congenital first-degree atrioventricular block. A His bundle electrocardiographic study.
mesh_terms: D000328:Adult; D001285:Atropine / Q000627:therapeutic use; D004562:Electrocardiography; D005260:Female; D006327:Heart Block / Q000151:congenital* / Q000503:physiopathology; D006329:Heart Conduction System / Q000503:physiopathology*; D006339:Heart Rate / Q000187:drug effects; D006344:Heart Septal Defects, Atrial / Q000503:physiopathology; D006801:Humans; D010138:Pacemaker, Artificial
chemical_list: D001285:Atropine