title: Mechanisms of A-V block.
mesh_terms: D000200:Action Potentials; D001281:Atrial Fibrillation / Q000503:physiopathology; D001282:Atrial Flutter / Q000503:physiopathology; D001285:Atropine / Q000494:pharmacology; D004071:Digitalis Glycosides / Q000494:pharmacology; D004558:Electric Stimulation; D004562:Electrocardiography; D006325:Heart Atria; D006327:Heart Block / Q000503:physiopathology*; D006329:Heart Conduction System / Q000187:drug effects / Q000503:physiopathology*; D006352:Heart Ventricles; D006801:Humans; D007545:Isoproterenol / Q000494:pharmacology; D010138:Pacemaker, Artificial; D013268:Stimulation, Chemical; D014630:Vagus Nerve / Q000502:physiology
chemical_list: D004071:Digitalis Glycosides; D001285:Atropine; D007545:Isoproterenol