Reverse Nystagmus and its Effect on Prognosis in Posterior Canal Benign Paroxysmal Positional Vertigo.

Jafarov, Sabuhi; Hızal, Evren; Bahçecitapar, Melike; Özlüoğlu, Levent Naci

Objective: To investigate the incidence of reverse nystagmus seen in seated position, which is the second step in the Dix-Hallpike maneuver, in posterior canal BPPV, and to explore its correlation with the canalith repositioning procedure (Epley maneuver). Methods: Records of 5,651 patients who underwent the videonystagmography test in a tertiary hospital between October 2016 and March 2019 were examined. Video recordings of 321 patients with posterior canal BPPV were scrutinized and the data obtained were analyzed. Results: Reverse nystagmus was observed in 85% of the posterior canal BPPV patients. The number of canalith repositioning maneuvers required for treatment in patients with reverse nystagmus (1.32±0.68) was found to be less than that required in patients without reverse nystagmus (1.81±0.98) (p<0.001). Reverse nystagmus was not associated with recurrence (p=0.623). Conclusion: The absence of reverse nystagmus in seated position in the Dix-Hallpike test predicts that the therapeutic success of the maneuver in posterior canal BPPV will be low and repeated applications would be necessary to achieve successful outcome.

BENIGN paroxysmal positional vertigo; SEMICIRCULAR canals; NYSTAGMUS

Turkish Archives of Otolaryngology / Türk Otolarengoloji Arsivi, 2019, Vol 57, pS1

0304-4793

Academic Journal

10.5152/tao.2019.20012