title: Pacemaker-induced reciprocal rhythm.
mesh_terms: D001146:Arrhythmia, Sinus / Q000209:etiology*; D001285:Atropine / Q000494:pharmacology / Q000627:therapeutic use; D004562:Electrocardiography; D006321:Heart / Q000187:drug effects; D006325:Heart Atria / Q000503:physiopathology; D006329:Heart Conduction System / Q000503:physiopathology; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D014693:Ventricular Fibrillation / Q000209:etiology
chemical_list: D001285:Atropine