title: Histamine 2 receptor antagonism by cimetidine and sinus-node function.
mesh_terms: D001145:Arrhythmias, Cardiac / Q000150:complications / Q000628:therapy; D002927:Cimetidine / Q000494:pharmacology*; D004562:Electrocardiography; D006146:Guanidines / Q000494:pharmacology*; D006339:Heart Rate / Q000187:drug effects; D006635:Histamine H2 Antagonists / Q000494:pharmacology*; D006801:Humans; D010138:Pacemaker, Artificial; D012849:Sinoatrial Node / Q000187:drug effects*
chemical_list: D006146:Guanidines; D006635:Histamine H2 Antagonists; D002927:Cimetidine