Involvement of auditory pathway in migrainous vertigo among those visiting the audio-vestibular clinic in a tertiary care hospital.

John, Mathew (2013) Involvement of auditory pathway in migrainous vertigo among those visiting the audio-vestibular clinic in a tertiary care hospital. Masters thesis, Christian Medical College, Vellore.


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Migrainous vertigo is a vestibular syndrome which is caused by migraine and is characterised by short spells of spontaneous or positional vertigo which can lasts from only a few seconds to weeks. There are no established diagnostic criteria for migrainous vertigo as it is not included presently in the International Headache Society classification of migraine . Neuhauser however proposed a diagnostic criterion for the entity and that has been widely accepted. Migrainous vertigo was a poorly known entity till 1980s. Migrainous vertigo associated with problems in auditory pathway is even less well-known or documented. There are only a few numbers of studies addressing this issue. Migraine and migrainous vertigo are considered to be a result of chemical abnormalities in the Serotonin pathway. Aims and Objectives 1. Review data of all patients with vertigo to assess the frequency of migrainous Vertigo among patients attending the Audio vestibular clinic of CMC over a 6 month period prior to start of a prospective evaluation. 2. Determine the frequency of auditory dysfunction among patients with migrainous vertigo compared to the normal. 3. Evaluate the auditory status of patients with migrainous vertigo Limitations of the study This study was not powered to bring out differences between cases and controls for the various tests performed. A larger sample size may have provided results that were different. One reason for this smaller sample was the cost involved in recruiting more normal controls. The sample size is smaller than required. This was because of the cost factor involved in recruiting more normal controls. The matching of patients could have been closer than what was done. Often the recruitment had to depend on the availability of cases that fulfilled selection criteria and time. Conclusions The frequency of migrainous vertigo in a tertiary care specialised audiovestibular clinic was 22%. The largest age group attending tertiary care for this problem were in age group 31-40 (58%), The male: female ratio was 1:1.2. The frequency of hearing loss was 34% among 400 charts screened retrospectively. Symptoms pointing to posterior circulation territory involvement were present as an aura in all patients. 33% percent of patients had documented bilateral mild sensory hearing loss. Tympanometry and stapedial reflex were normal in all patients There was significant difference between cases and control in the presence of distortion product otoacoustic emissions in both ears as well as in the absolute latency of wave V signifying the involvement of auditory pathway in migrainous vertigo.

Item Type: Thesis (Masters)
Uncontrolled Keywords: auditory pathway; migrainous vertigo; audio-vestibular; tertiary care
Subjects: MEDICAL > Otolaryngology
Depositing User: Devi S
Date Deposited: 13 Jul 2017 09:39
Last Modified: 13 Jul 2017 09:39

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