title: A case of the sick sinus syndrome.
mesh_terms: D000368:Aged; D001146:Arrhythmia, Sinus / Q000175:diagnosis* / Q000628:therapy; D004562:Electrocardiography; D005260:Female; D006323:Heart Arrest / Q000175:diagnosis; D006801:Humans; D007545:Isoproterenol / Q000627:therapeutic use; D010138:Pacemaker, Artificial; D013575:Syncope / Q000175:diagnosis
chemical_list: D007545:Isoproterenol