Pathophysiology of the Meniere attack: facts and theories

Area of Science:

• Otolaryngology
• Neurology
• Pathophysiology

Background:

• Meniere's disease is characterized by episodic vestibular and cochlear dysfunction.
• Clinical presentation often includes simultaneous onset or co-occurrence of both cochlear and vestibular symptoms during attacks.
• The underlying pathophysiology of Meniere's disease and its acute attacks remains incompletely understood.

Purpose of the Study:

• To provide a pathophysiological interpretation of clinical findings in Meniere's disease.
• To investigate the relationship between cochlear and vestibular symptoms during Meniere's attacks.
• To differentiate the pathogenesis of Meniere's attacks from the underlying endolymphatic hydrops.

Main Methods:

• Clinical findings analysis of Meniere's disease onset and attack patterns.
• Review of existing literature on Meniere's disease pathophysiology.
• Pathophysiological interpretation based on symptom presentation.

Main Results:

• In one-third of cases, cochlear and vestibular symptoms initiate simultaneously at Meniere's disease onset.
• The majority of Meniere's disease attacks exhibit concurrent cochlear and vestibular symptoms.
• A significant proportion of patients experience both types of symptoms during an attack.

Conclusions:

• The Meniere's attack is unlikely caused by a slowly expanding endolymphatic system leading to rupture or leakage.
• The pathogenesis of an acute Meniere's attack appears distinct from the pathophysiology of the underlying endolymphatic hydrops.
• A revised understanding of Meniere's attack mechanisms is proposed, separate from chronic hydrops progression.