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Pulse-synchronous torsional nystagmus.
Pract Neurol
October 2021
Department of Neurology, Medical University of Vienna, Wien, Austria
Purely torsional spontaneous nystagmus almost always has a central vestibular cause. We describe a man with spontaneous pulse-synchronous torsional nystagmus in which the clockwise component corresponded to his pulse upswing, in keeping with a peripheral vestibular cause; following imaging we diagnosed left-sided superior canal dehiscence syndrome. Identifying pulse synchronicity of spontaneous nystagmus may help to distinguish central from peripheral vestibular torsional nystagmus, and is readily confirmed at the bedside using Frenzel's glasses and a pulse oximeter.
View Article and Find Full Text PDFPulse-synchronous torsional pendular nystagmus in unilateral superior canal dehiscence.
Neurology
April 2008
Northwestern University Feinberg School of Medicine, Department of Neurology, 710 North Lake Shore Drive, Abbott Hall, 11th floor, Chicago, IL 60611-3078, USA.
Posterior canal dehiscence syndrome caused by an apex cholesteatoma.
Otol Neurotol
June 2006
Department of Audiology, Karolinska Hospital, Stockholm, Sweden.
Objective: To compare audio-vestibular findings caused by a dehiscence of the posterior semicircular canal with those found in the superior canal dehiscence syndrome.
Study Design: Case report.
Setting: University hospital, tertiary referral center.
Subarcuate venous malformation causing audio-vestibular symptoms similar to those in superior canal dehiscence syndrome.
Otol Neurotol
November 2004
Departments of Audiology, Karolinska Hospital, St. Eriks Eye Hospital, Stockholm, Sweden.
Objective: To present a patient with symptoms similar to those of superior canal dehiscence syndrome due to another cause.
Study Design: Case report.
Setting: University hospital, tertiary referral center.
Symptoms, findings and treatment in patients with dehiscence of the superior semicircular canal.
Acta Otolaryngol
January 2001
Department of Audiology, Karolinska Hospital, Huddinge Hospital, Stockholm, Sweden.
Recently Minor and co-workers described patients with sound- and pressure-induced vertigo due to dehiscence of the superior semicircular canal. Identifying patients with this 'new' vestibular entity is important, not only because the symptoms are sometimes very incapacitating, but also because they can be treated. We present symptoms and findings in eight such patients, all of whom reported pressure-induced vertigo that increased during periods of upper respiratory infections.
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