All the BVH patients were examined clinically before MHIT. A separate questionnaire was sent on average 3.5 (range, 1-7) years after the diagnosis about their present balance difficulties, dizziness, frequency of unsteadiness, and influence on the quality of life.
An example of the MHIT of a patient, who was suffering from bilateral Meniere's disease, is shown in Figure 1.
The mean gain[+ or -]SD in the MHIT of 23 patients with the BVH was 0.26[+ or -]0.17 on the right and 0.26[+ or -]0.14 on the left side.
We found 23 patients with BVH confirmed with the MHIT in our vestibular laboratory.
The MHIT is motorized version of quantitative head impulse tests, which are capable of detecting dysfunction of individual semicircular canal .