Dizziness due to dysautonomia: response to specific therapy.

We have reported a case of hypervagal dysautonomia in which there was improvement in the results of autonomic nervous system tests (ANSTs) as well as in the patient's symptoms. This patient is one of more than 200 patients who have had our testing protocol. Although a high percentage of autonomic dysfunction was detected in this group of patients, we do not suggest that these tests be applied routinely to every patient complaining of dizziness. Rather, ANSTs should be selectively administered after otologic disease has been excluded and when dizziness is accompanied by various other symptoms.