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From the Departments of Neurology (Drs. Strupp, Planck, Arbusow, and Prof. Brandt), Neurosurgery (Prof. Steiger), and Neuroradiology (Prof. Brückmann), Klinikum Großhadern, Ludwig-Maximilians University, Munich, Germany.
Address correspondence and reprint requests to Priv.-Doz. Dr. M. Strupp, Department of Neurology, Ludwig-Maximilians University, Klinikum Großhadern, Marchioninistraße 15, D-81366 Munich, Germany.
Leftward head rotations in a patient with a rotational vertebral artery occlusion syndrome elicited recurrent uniform attacks of severe rotatory vertigo and tinnitus in the right ear. These attacks were accompanied by a mixed clockwise torsional downbeat nystagmus with a horizontal component toward the right. A transient ischemia of the right labyrinth probably induced the attacks and led to a combined transient excitation of the right anterior and horizontal semicircular canals as well as the cochlea.
Key words: VertigoNystagmusHead rotationVertebral artery compression.
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