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Ann Intern Med. 1992 Dec 1;117(11):898-904.

Causes of persistent dizziness. A prospective study of 100 patients in ambulatory care.

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1
Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD.

Abstract

OBJECTIVE:

To determine the causes of persistent dizziness in outpatients.

DESIGN:

Consecutive adult outpatients presenting with a chief complaint of dizziness.

SETTING:

Four clinics (internal medicine, walk-in, emergency room, and neurology) in a teaching hospital.

PATIENTS:

Of 185 patients presenting during the 10-month study period, 51 (28%) had minimal or no dizziness at 2-week follow-up. Of the remaining 134 patients, 100 completed the study protocol (mean age, 62 years; range, 20 to 85 years).

MEASUREMENTS:

Evaluation included a detailed study questionnaire, standardized physical examination, vestibular testing by a neuro-ophthalmologist, laboratory tests, audiometry, and a structured psychiatric interview. Data were abstracted onto a standard form and reviewed by three raters. Raters independently assigned diagnoses using explicit criteria, with the final cause determined by consensus.

RESULTS:

Primary causes of dizziness included vestibular disorders (54 patients), psychiatric disorders (16 patients), presyncope (6 patients), dysequilibrium (2 patients), and hyperventilation (1 patient); dizziness was multicausal in 13 patients and of unknown cause in 8 patients. Many of those with a single primary cause, however, had at least one other condition contributing to their dizziness; only 52% of patients had a single "pure" cause. Thirty patients had a potentially treatable primary cause, the most common being benign positional vertigo (BPV) (16%) and psychiatric disorders (6%). Central vestibulopathies detected in 10 patients were presumably vascular or idiopathic in origin. No brain tumors or cardiac arrhythmias were found.

CONCLUSIONS:

Vestibular disease and psychiatric disorders are the most common causes of persistent dizziness in outpatients. In about 50% of patients with dizziness, more than one factor causes or aggravates symptoms. Life-threatening causes were rare, even in our elderly population.

PMID:
1443950
[Indexed for MEDLINE]
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