title: New ways to assess stroke risk and tame an abnormal heartbeat.  Cardiology groups update guidelines to treat atrial fibrillation.
mesh_terms: D000368:Aged; D000925:Anticoagulants / Q000627:therapeutic use*; D001241:Aspirin / Q000627:therapeutic use; D001281:Atrial Fibrillation / Q000175:diagnosis / Q000188:drug therapy / Q000517:prevention & control*; D005343:Fibrinolytic Agents / Q000627:therapeutic use*; D006801:Humans; D008875:Middle Aged; D017410:Practice Guidelines as Topic; D011320:Primary Health Care; D018570:Risk Assessment / Q000379:methods; D020521:Stroke / Q000175:diagnosis / Q000188:drug therapy / Q000517:prevention & control*; D014481:United States; D014859:Warfarin / Q000627:therapeutic use
chemical_list: D000925:Anticoagulants; D005343:Fibrinolytic Agents; D014859:Warfarin; D001241:Aspirin