title: Origin of "A-V nodal" rhythm.
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology; D000200:Action Potentials; D000818:Animals; D004285:Dogs; D004558:Electric Stimulation; D004562:Electrocardiography; D006321:Heart / Q000187:drug effects; D006329:Heart Conduction System / Q000187:drug effects; D009132:Muscles / Q000187:drug effects; D010827:Physiology; D014630:Vagus Nerve / Q000502:physiology
chemical_list: D000109:Acetylcholine