Summary
Ménière's disease is a clinical syndrome of recurrent spontaneous vertigo with fluctuating aural symptoms and documented low/mid-frequency SNHL in the affected ear. Endolymphatic hydrops is associated with it but does not alone establish the diagnosis. Bárány2015
Definite disease requires at least 2 spontaneous vertigo episodes lasting 20 minutes to 12 hours, documented low/mid-frequency SNHL in that ear on at least one occasion before, during or after an attack, fluctuating hearing/tinnitus/fullness in that ear and no better explanation.
Probable disease requires at least 2 episodes of vertigo or dizziness lasting 20 minutes to 24 hours, fluctuating aural symptoms in that ear and no better explanation; audiometric confirmation is not required. Bárány2015
Treatment aims to reduce attacks and disability while protecting hearing and balance. Confirm the active ear, hearing usefulness and contralateral vestibular reserve before an irreversible treatment.
More detail
Hearing can fluctuate initially and later remain impaired. Vertigo remission does not guarantee hearing recovery or exclude future contralateral disease.