title: Anatomy related to atrioventricular block.
mesh_terms: D001338:Autonomic Fibers, Postganglionic; D001339:Autonomic Fibers, Preganglionic; D002467:Cell Nucleus; D003331:Coronary Vessels / Q000473:pathology; D003593:Cytoplasm; D004699:Endocardium / Q000473:pathology; D006325:Heart Atria; D006327:Heart Block / Q000473:pathology* / Q000503:physiopathology; D006329:Heart Conduction System / Q000098:blood supply / Q000473:pathology* / Q000503:physiopathology; D006346:Heart Septum; D006352:Heart Ventricles; D006801:Humans; D008854:Microscopy, Electron; D009210:Myofibrils; D009434:Neural Pathways; D010210:Papillary Muscles / Q000473:pathology; D014630:Vagus Nerve / Q000473:pathology