title: Localization and significance of atrioventricular block.
mesh_terms: D000889:Anti-Arrhythmia Agents / Q000494:pharmacology; D002037:Bundle-Branch Block / Q000503:physiopathology; D004562:Electrocardiography; D004594:Electrophysiology; D006321:Heart / Q000187:drug effects; D006327:Heart Block / Q000473:pathology / Q000503:physiopathology*; D006329:Heart Conduction System; D006801:Humans
chemical_list: D000889:Anti-Arrhythmia Agents