trainee · clinical case

Episodic vertigo with fluctuating hearing loss

Vignette

A 47-year-old woman has had 7 episodes over the past year of spinning vertigo lasting 30–90 minutes, with low-frequency fluctuating hearing loss and aural fullness on the right. Audiogram between attacks shows a 35 dB low-frequency loss on the right.

RCT pattern

Gain · eye / chair00.601.200.010.020.040.080.160.320.64frequency (Hz, log)Phase lead · degrees-2030800.010.020.040.080.160.320.64frequency (Hz, log)Symmetry · %-500500.010.020.040.080.160.320.64frequency (Hz, log)
Three-panel SHA summary. Shaded green = published normal band. Solid marker = patient/archetype curve; dashed = overlaid reference if shown.

Question

What is the most likely interictal RCT finding?