Kidney dysfunction speeds cognitive decline by ProQuest


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									newsline1209.qxp    11/25/2009      12:02 PM     Page 16

      Quick eye test can indicate possible stroke
      CLINICIANS may soon have a                                                                         rendered the correct diagnosis for
      simple method for diagnosing                                                                       these patients. In a statement de-
      stroke in patients complaining of                                                                  scribing the findings, neurologist
      dizziness,nausea,and spinning sen-                                                                 and lead investigator David E.
      sations. Stroke researchers are test-                                                              Newman-Toker, MD, of Johns
      ing a one-minute eye movement                                                                      Hopkins Medicine in Baltimore
      exam that involves three maneu-                                                                    says,“The idea that a bedside ex-
      vers:moving the patient’s head rap-                                                                am could outperform a modern
      idly from side to side to detect an                                                                neuroimaging test such as MRI is
      inability to keep the eyes stable;                                                                 something that most people had
      looking for jerking eye move-                                                                      given up for dead, but we’ve
      ments when the patient’s eyes fol-                                                                 shown it is possible.”
      low the clinician’s finger as it                                                                     Previous research had shown that
      moves right and left; and checking                                                                 people experiencing a stroke have
      the patient’s eye position to see if    nausea/vomiting,head-motion in-         The “follow my     eye-movement alterations that
      one eye is higher than the other.       tolerance, nystagmus, and un-           finger” test is    correlate with stroke damage to
      (Stroke.2009;40:3504-3510).             steady gait).All the study subjects     part of a brief    various areas of the brain — alter-
        In a recent small “proof of prin-     had felt severe dizziness for several   eye movement       ations that are distinct from those
      ciple” study, 69 of 69 strokes were     continuous hours and had at least       exam to help       caused by benign ear problems. In
      correctly diagnosed using the           one risk factor for stroke.             diagnose stroke.   addition to successfully identify-
      HINTS (Head-Impulse/Nystag-               MRI scans fared less well than                           ing stroke, the eye-movement tes
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