title: Clinical spectrum of the sick sinus syndrome.
mesh_terms: D000328:Adult; D000368:Aged; D000889:Anti-Arrhythmia Agents / Q000627:therapeutic use; D001146:Arrhythmia, Sinus / Q000175:diagnosis* / Q000188:drug therapy / Q000503:physiopathology / Q000628:therapy; D001532:Atropa belladonna / Q000627:therapeutic use; D001285:Atropine / Q000627:therapeutic use; D001919:Bradycardia / Q000175:diagnosis; D004562:Electrocardiography; D005260:Female; D006323:Heart Arrest / Q000175:diagnosis; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D008517:Phytotherapy; D010946:Plants, Medicinal; D010947:Plants, Toxic; D013566:Sympathomimetics / Q000627:therapeutic use; D013577:Syndrome; D013610:Tachycardia / Q000175:diagnosis
chemical_list: D000889:Anti-Arrhythmia Agents; D013566:Sympathomimetics; D001285:Atropine