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Clin Neurophysiol. 2014 Mar;125(3):608-14. doi: 10.1016/j.clinph.2013.08.008. Epub 2013 Sep 14.

Autonomic dysfunction as a possible cause of residual dizziness after successful treatment in benign paroxysmal positional vertigo.

Author information

1
Department of Neurology, Keimyung University School of Medicine, Daegu, Republic of Korea; Brain Research Institute, Keimyung University School of Medicine, Daegu, Republic of Korea.
2
Department of Neurology, Keimyung University School of Medicine, Daegu, Republic of Korea; Brain Research Institute, Keimyung University School of Medicine, Daegu, Republic of Korea. Electronic address: hlee@dsmc.or.kr.

Abstract

OBJECTIVE:

To investigate whether residual dizziness after successful treatment in patients with benign paroxysmal positional vertigo (BPPV) was associated with autonomic dysfunction.

METHODS:

Fifty-eight consecutive patients with BPPV who had successful canal repositioning procedures (CRPs) and showed no nystagmus or positional vertigo at the next follow-up visit were enrolled and divided into two groups with and without residual dizziness. We performed a standardized autonomic function test.

RESULTS:

Of the 58 patients, 25 (43%) complained of residual dizziness after successful CRPs, in which postural lightheadedness when righting from sitting, or short-lasting nonspecific dizziness that occurred during head movement or walking were common complaints. Orthostatic hypotension (OH) occurred in 11 patients (19%). Incidence of OH was significantly higher in patients with residual dizziness at the next follow-up than those without residual dizziness (40% and 3%, p=0.000). Compared to patients without residual dizziness, patients with residual dizziness had larger falls in systolic BP during the valsalva maneuver and head-up tilt test. However, cardiovagal parasympathetic function was not different between the patients with and without residual dizziness.

CONCLUSION:

In BPPV, residual dizziness after successful treatment may be associated with sympathoneural autonomic dysfunction.

SIGNIFICANCE:

This investigation could be useful in understanding the mechanism of residual dizziness in patients with BPPV.

KEYWORDS:

Autonomic dysfunction; BPPV; Residual dizziness

PMID:
24045026
DOI:
10.1016/j.clinph.2013.08.008
[Indexed for MEDLINE]

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