The Effect of Elevated Intracranial Pressure on Frequency Tuning of Air-Conducted Ocular Vestibular Myogenic Potentials in Meniere's Disease Patients

Maxwell, Rebecca; Jerin, Claudia und Gürkov, Robert (2017): The Effect of Elevated Intracranial Pressure on Frequency Tuning of Air-Conducted Ocular Vestibular Myogenic Potentials in Meniere's Disease Patients. In: Otology & Neurotology, Bd. 38, Nr. 6: S. 916-920

Abstract

Objective: To investigate the effect of increased intracranial pressure on ocular vestibular-evoked myogenic potential (oVEMP) amplitudes and frequency tuning in patients with Meniere's disease (MD) to elucidate whether oVEMPS recorded under such conditions could provide a simple and accurate diagnostic test for MD. Setting: Tertiary referral center for otology and neurotology. Patients: Ten patients with certain unilateral MD (mean age = 48.2 yr, range 25-75 yr, 6 males and 4 females) as confirmed by a locally enhanced inner ear MRI (LEIM) were enrolled in this study. Design: Air-conducted tone-burst oVEMP amplitudes were measured in response to 500 Hz and 1000 Hz in the horizontal plane (0 degree), a 20-degree head-down position. Results: Tilting the patients from the horizontal position to the 20-degree head-down position led to a large reduction in oVEMP amplitudes to the 500 Hz tone burst (3.02 mu V vs 1.17 mu V, p = 0.005) and to a smaller one in the 1000 Hz tone burst (2.28 mu V vs 1.78 mu V, p = 0.013) in the Meniere's ear. Accordingly, the 500/1000 Hz frequency-tuning ratio was significantly decreased in the Meniere's ear as a result of this manoeuver (1.36 vs 0.75, p = 0.005). Conclusion: oVEMP amplitudes and frequency tuning in MD patients show a similar behavior to that found in healthy control subjects. oVEMP testing of putative MD patients in the tilted position is therefore unlikely to be diagnostically useful.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Medizin
• Themengebiete: 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin und Gesundheit
• ISSN: 1531-7129
• Sprache: Englisch