Transtympanic electrocochleography in Ménière's disease: variation in the amplitude of the summating potential related to clinical status.

A patient with Ménière's disease is presented in whom several transtympanic electrocochleographic recordings were made during the course of the disease. Variations in the amplitude of the Summating Potential are related to clinical status. These findings lend support to the theory that the enhanced negative SP in Ménière's disease is produced by endolymphatic hydrops. The scientific evidence for this theory is discussed.