Bruns' nystagmus revisited: A sign of stroke in patients with the acute vestibular syndrome (AVS).

Mantokoudis, Georgios; Korda, Athanasia; Zee, David S; Zamaro, Ewa; Sauter, Thomas C; Wagner, Franca; Caversaccio, Marco (2021). Bruns' nystagmus revisited: A sign of stroke in patients with the acute vestibular syndrome (AVS). European journal of neurology, 28(9), pp. 2971-2979. Wiley 10.1111/ene.14997

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OBJECTIVE

Gaze-evoked nystagmus (GEN) is a central sign in patients with the acute vestibular syndrome (AVS); however, discriminating between a pathological and a physiologic GEN is a challenge. Here we evaluate GEN in patients with AVS.

METHODS

In this prospective cross-sectional study, we used video-oculography (VOG) to compare GEN in the light (target at 15 degrees eccentric) in 64 healthy subjects with 47 patients seen in the emergency department (ED) who had AVS; 35 with vestibular neuritis and 12 with stroke. All patients with an initial non-diagnostic MRI received a confirmatory, delayed MRI as a reference standard in detecting stroke.

RESULTS

Healthy subjects with GEN had a time constant of centripetal drift >18s. VOG identified pathologic GEN (time constant ≤ 18s) in 33% of patients with vestibular strokes, specificity was 100%, accuracy was 83%. Results were equivalent to examination by a clinical expert. As expected, since all patients with GEN had a SN in straight-ahead position, they showed the pattern of a Bruns' nystagmus.

CONCLUSIONS

One third of patients with AVS due to central vestibular strokes had a spontaneous SN in straight-ahead gaze and a pathological GEN, producing the pattern of a Bruns' nystagmus with a shift of the null position. The localization of the side of the lesion based on the null was not consistent, presumably because the circuits underlying gaze-holding are widespread in the brainstem and cerebellum. Nevertheless, automated quantification of GEN with VOG was specific, and accurately identified patients in the ED with AVS due to strokes.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Ear, Nose and Throat Disorders (ENT)
04 Faculty of Medicine > Department of Radiology, Neuroradiology and Nuclear Medicine (DRNN) > Institute of Diagnostic and Interventional Neuroradiology

UniBE Contributor:

Mantokoudis, Georgios; Korda, Athanasia; Zamaro, Ewa; Wagner, Franca and Caversaccio, Marco

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1468-1331

Publisher:

Wiley

Language:

English

Submitter:

Martin Zbinden

Date Deposited:

06 Jul 2021 12:31

Last Modified:

14 Aug 2021 01:34

Publisher DOI:

10.1111/ene.14997

PubMed ID:

34176187

Uncontrolled Keywords:

Bruns’ nystagmus Gaze-evoked nystagmus HINTS acute vestibular syndrome gaze-holding nystagmus

BORIS DOI:

10.48350/157294

URI:

https://boris.unibe.ch/id/eprint/157294

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