title: Chronic sinoatrial heart block.
mesh_terms: D000328:Adult; D000368:Aged; D001146:Arrhythmia, Sinus / Q000150:complications / Q000175:diagnosis / Q000188:drug therapy / Q000453:epidemiology / Q000209:etiology / Q000628:therapy; D001285:Atropine / Q000627:therapeutic use; D001344:Autopsy; D001919:Bradycardia / Q000175:diagnosis; D002908:Chronic Disease; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology; D006352:Heart Ventricles / Q000473:pathology; D006801:Humans; D007239:Infections / Q000150:complications; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D011379:Prognosis; D012849:Sinoatrial Node / Q000473:pathology; D013610:Tachycardia / Q000175:diagnosis
chemical_list: D001285:Atropine