Relationship between residual dizziness and cerebrovascular reactivity after reduction of idiopathic benign paroxysmal positional vertigo

Abstract

Objective To investigate the relationship between residual dizziness （RD） and cerebrovascular reactivity （CVR） in patients with idiopathic benign paroxysmal positional vertigo （BPPV） after successful manipulative reduction. Methods Dizziness Handicap Inventory （DHI） scores of 117 patients with idiopathic BPPV were recorded. After successful manipulative reduction, CVR was measured by breath-hold-at-inhalation （BHI） with transcranial doppler （TCD） ultrasound, and the incidence of RD within one week was observed. All patients were divided into the RD group （n = 46） and non-RD group （n = 71） according to the presence of RD. the relationship between RD and CVR after reduction was analyzed. Results The total score of DHI in patients with RD after reduction was significantly higher than that in those without RD, especially the DHI-E and DHI-F scores （all P < 0.05）. BHI in patients without RD was significantly higher than that in patients with RD （P < 0.05）. In the non-RD group, the severity of vertigo was not associated with BHI （P > 0.05）, whereas there was a correlation between vertigo and BHI in the RD group （P < 0.05）. Conclusion The abnormal emotion and physical function of BPPV patients may increase the risk of RD after reduction. Good CVR might reduce the occurrence of RD.

Keywords

• |idiopathic benign paroxysmal positional vertigo|residual dizziness|cerebrovascular reactivity