title: Letter: An unusual effect of atropine on overdrive suppression.
mesh_terms: D001285:Atropine / Q000008:administration & dosage; D001919:Bradycardia / Q000188:drug therapy; D004562:Electrocardiography; D005260:Female; D006323:Heart Arrest / Q000209:etiology; D006327:Heart Block / Q000175:diagnosis*; D006333:Heart Failure / Q000209:etiology; D006801:Humans; D007275:Injections, Intravenous; D008875:Middle Aged; D012849:Sinoatrial Node / Q000187:drug effects / Q000503:physiopathology*; D013268:Stimulation, Chemical
chemical_list: D001285:Atropine