title: The sick sinus syndrome.
mesh_terms: D000293:Adolescent; D000368:Aged; D001285:Atropine; D002304:Cardiac Pacing, Artificial; D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography; D006801:Humans; D007223:Infant; D007545:Isoproterenol; D008875:Middle Aged; D010138:Pacemaker, Artificial; D011379:Prognosis; D012804:Sick Sinus Syndrome / Q000175:diagnosis* / Q000209:etiology / Q000628:therapy
chemical_list: D001285:Atropine; D007545:Isoproterenol