An implantable demand pacemaker.
D000109:Acetylcholine / Q000494:pharmacology; D000818:Animals; D004285:Dogs; D004562:Electrocardiography; D006321:Heart / Q000187:drug effects; D006327:Heart Block / Q000628:therapy*; D007545:Isoproterenol / Q000494:pharmacology; D010138:Pacemaker, Artificial
D007545:Isoproterenol; D000109:Acetylcholine