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.
- Canal paresis
- vascular cause
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Funding This work was supported by the research promoting grant from the Keimyung University Dongsan Medical Center in 2008.
Competing interests None.
Ethics approval This study was conducted with the approval of the Keimyung University School of Medicine.
Provenance and peer review Not commissioned; externally peer reviewed.