title: First degree atrioventricular block--a consequence of abnormal His bundle condition.
mesh_terms: D000328:Adult; D000790:Angiocardiography; D006328:Cardiac Catheterization; D004562:Electrocardiography; D005260:Female; D006327:Heart Block / Q000175:diagnosis*; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans