Dizziness in the emergency room: diagnoses and misdiagnoses.

BACKGROUND

Dizziness is among the most frequent neurological chief complaints in emergency room (ER) patients. Although the majority of underlying disorders are benign, serious causes that require immediate in-hospital treatment may occur that are difficult to identify clinically.

METHODS

Retrospective study of 475 consecutive ER neurological consultations with dizziness as the chief complaint.

RESULTS

Of all ER dizziness patients, 73% were initially assigned to benign and 27% to serious diagnoses. The two most frequent disorders were benign paroxysmal positional vertigo (22%) and stroke (20%). On follow-up (available in 124 patients), 43% of all ER diagnoses were corrected: 6% of benign ER diagnoses were corrected to serious diagnoses, 23% of serious ER diagnoses were revised to benign. The most frequent corrections concerned patients with an ER diagnosis of stroke or vestibular neuronitis.

CONCLUSIONS

In the patient sample studied here, serious causes of dizziness were more prevalent than can be expected from population-based surveys or data from specialized outpatient departments. However, inappropriate assignment of dizziness patients to benign diagnoses still occurred in a relevant proportion of patients. ER clinical pathways, planning of imaging resources and follow-up of patients in- and outside the hospital must take these points into consideration.