목적: The results between caloric test and video head impulse test (vHIT) can be different, depending on the functional status of clinical entity of dizziness, probably due to the different range of test frequency in vestibulo-ocular reflex. In this study, cases with different results between two tests were categorized to find out the further diagnostic value of these two tests. 방법:211 ears from 201 patients who both bithermal caloric test and vHIT were performed, were included. vHIT was performed using ICS impulse (GN Otometrics, Denmark) on horizontal plane with control of peak head velocity as 150-200 degree/second. Canal paresis (CP) more than 25% in caloric test and the presence of corrective saccade with low gain (less than 0.8) in vHIT were decided as abnormal. Clinical findings of the patients with different results between caloric test and vHIT were reviewed and categorized according to the causes of dizziness. 결과:The results between caloric test and vHIT were opposite in 32.2% (68/211 ears) which were normal vHIT with canal paresis(vHIT- & CP+) in 92.6%(63 ears) and abnormal vHIT without canal paresis(vHIT+ & CP-) in 7.4%(5 ears). 63 ears of vHIT- & CP+ included Menieres disease (32 ears, 50.8%), benign recurrent vertigo (12 ears, 19%), positional vertigo of unknown cause (9 ears, 14.3%) and other causes of dizziness (10 ears, 15.9%). In case of 55 ears of Menieres disease included in this study, the results were opposite in 32 ears(58.2%) which all of them were vHIT- & CP+. vHIT+ & CP- were only 5 ears, which were acute vertigo syndrome in 2 ears, opposite ears of unilateral vestibular loss in 2 ears, and unknown cause of dizziness in 1 ear. 결론:In 32.2% of dizzy patients, the loss of VOR depends on the frequency range of VOR, and vHIT- & CP+ is the most common pattern. The most common clinical entity of vHIT- & CP+ is Menieres disease, but the frequency selective loss of VOR occurs in variety of causes of dizziness.