Functional head impulse test and video head impulse test in interictal Ménière’s disease and inferior vestibular neuritis: a preliminary comparative study - Report - MDSpire
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Functional head impulse test and video head impulse test in interictal Ménière’s disease and inferior vestibular neuritis: a preliminary comparative study
Clinical Report: Comparative Analysis of FHIT and vHIT in Vestibular Disorders
Overview
This study investigates the differences in functional head impulse test (FHIT) and video head impulse test (vHIT) responses in patients with interictal Ménière’s disease (MD) and inferior vestibular neuritis (IVN).
Background
Ménière’s disease is characterized by episodes of vertigo and fluctuating hearing loss, often associated with endolymphatic hydrops. The dissociation between caloric testing and vHIT results in MD presents a diagnostic challenge. Understanding the functional implications of these tests can enhance clinical assessments and management strategies for vestibular disorders.
Data Highlights
Test
MD Lesion Side
MD Intact Side
IVN Lesion Side
FHIT-H CA%
53.9 ± 33.5%
77.3 ± 26.5%
N/A
vHIT-H Gain
N/A
N/A
Reduced
DVA
N/A
N/A
N/A
Key Findings
In MD, lesion-side FHIT-H CA% was significantly lower than intact-side (p = 0.022).
vHIT-H gain showed no significant laterality in MD (p = 0.146).
The FHIT laterality index significantly exceeded the vHIT-H laterality index (p = 0.019).
In IVN, lesion-side posterior canal vHIT gain was significantly reduced (p = 0.027).
FHIT may reflect functional vestibular changes related to endolymphatic hydrops in MD.
FHIT-H abnormality rate was 73% in MD compared to 18% in vHIT-H.
Clinical Implications
The findings indicate differences in FHIT and vHIT responses in patients with interictal Ménière’s disease.
Conclusion
This preliminary study highlights the contrasting patterns of FHIT and vHIT in MD and IVN.
