title: Sick sinus syndrome.
mesh_terms: D000368:Aged; D001285:Atropine / Q000627:therapeutic use; D004562:Electrocardiography; D005260:Female; D006801:Humans; D011433:Propranolol / Q000627:therapeutic use; D012804:Sick Sinus Syndrome / Q000175:diagnosis* / Q000188:drug therapy / Q000503:physiopathology
chemical_list: D001285:Atropine; D011433:Propranolol