Long-term outcome of canal paresis of a vascular cause.
There have been several reports on the progress of the caloric response of vestibular neuritis, but little is known about the recovery of canal paresis (CP) of a vascular cause. This study found that the caloric response normalised in 20 (67%) of 30 patients with CP associated with posterior circulation ischaemic stroke who were followed for at least 1 year (mean, 42.5 months; range, 14-85 months). The most commonly infarcted territory on brain MRI associated with CP was in the distribution of the anterior inferior cerebellar artery (26/30, 87%). None of the patients who were followed for >5 years after the onset of vertigo showed persistent CP. Residual dizziness did not differ significantly between patients with or without CP at the final follow-up. These findings suggest that CP associated with posterior circulation ischaemic stroke often has a good long-term outcome. Following patients for at least 5 years increases the likelihood of normalisation of the vestibular response to caloric stimulation.
Lee
Hyung
H
Department of Neurology, Keimyung University School of Medicine, Daegu, South Korea. hlee@dsmc.or.kr
Yi
Hyon-An
HA
Chung
In-Sung
IS
Lee
Seong-Ryong
SR
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001299:Audiometry; D002545:Brain Ischemia / Q000150:complications; D002150:Caloric Tests; D002533:Cerebral Angiography; D002544:Cerebral Infarction / Q000150:complications; D004424:Ear Canal; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D034381:Hearing Loss / Q000209:etiology; D006801:Humans; D018810:Magnetic Resonance Angiography; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009460:Neurologic Examination; D010243:Paralysis / Q000209:etiology / Q000628:therapy*; D012307:Risk Factors; D020521:Stroke / Q000150:complications; D014012:Tinnitus / Q000209:etiology; D016896:Treatment Outcome; D014717:Vertigo / Q000209:etiology; D055815:Young Adult