VHIT in Meniere’s diseaseDusan Pavlovic

Hearing and Balance Center Belgrade

Diagostics in Meniere’s

•Audiometry

•ECoG

•Caloric test

•VEMP

•MRI of ear

AIM

To describe VHIT in Meniere’s disease

To compare it with caloric test

Patients and Methods•29 pt from Jan 14 to Jan 16, with definite MD according to AAO-HNS

•Age: 54 yr / from 30 to 74 /

•15 man 14 woman

•9 Right ears 20 Left ears

•Duration of disease: 45,5 months / from 3 to 180 /

•Bithermal caloric test:

23% paresis or directional preponderance

•VHIT in all 6 canals

Control group

96 healthy subjects

Reference value: Mean gain - 2STD

Horizontal canal: 0,85

Anterior canal: 0,95

Posterior canal: 0,85

Posterior canal 60+ : 0,70

Deficient VOR in %

VOR gain

VOR gain doesn’t depend on years of illness

Comparation with caloric test

VHIT normal VHIT pat.

Caloric norm 10,34% (3) 13,79% (4) 24,13% (7)

Caloric pat. 34,48% (10) 41,37% (12) 75,86% (22)

44,82% (13) 55,17% (16) 100% (29)

VOR gain

VHIT normal VHIT pat.

Caloric norm 1,0 0,75

Caloric pat. 0,96 0,75

0,97 0,75

Conclusions•Pt with Meniere’s disease show deficit in high VOR fr. just in 55% of cases.

•VOR deficit is mostly in horizontal canals, rarely in vertical; in almost half of

cases reduced gain is on the contralateral side also

•Average reduction of VOR is 0,75

•Deficit in low VOR fr. doesn’t influence deficit in high fr

•Gain reduction isn’t influenced with caloric test result

•Gain reduction doesn’t depend on length of disease

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