Diagnostic Approach and Treatment for Beating Nystagmus

Diagnostic Evaluation

The American Academy of Otolaryngology-Head and Neck Surgery recommends performing the Dix-Hallpike maneuver to diagnose posterior semicircular canal BPPV, which presents with torsional, upbeating nystagmus when the affected ear is down 1
If Dix-Hallpike is negative or shows horizontal nystagmus, the American Academy of Otolaryngology-Head and Neck Surgery suggests performing the supine roll test to assess for lateral semicircular canal BPPV 2
The supine roll test technique involves positioning the patient supine with head in neutral position, quickly rotating the head 90 degrees to one side and observing for nystagmus, returning the head to neutral position and allowing any nystagmus to subside, and then rotating the head 90 degrees to the opposite side and observing for nystagmus 3

Geotropic type (most common): Horizontal nystagmus beating toward the undermost ear, more intense when rolled to the affected side, according to the American Academy of Otolaryngology-Head and Neck Surgery 4
Apogeotropic type: Horizontal nystagmus beating toward the uppermost ear, as noted by the American Academy of Otolaryngology-Head and Neck Surgery 4

The American Academy of Otolaryngology-Head and Neck Surgery recommends differentiating BPPV from other causes of vertigo and nystagmus, including otologic disorders such as Ménière's disease, vestibular neuritis, labyrinthitis, and superior canal dehiscence syndrome 6

The American Academy of Otolaryngology-Head and Neck Surgery suggests treating posterior canal BPPV with the canalith repositioning procedure (Epley maneuver) 1
For lateral canal BPPV, treatment depends on identifying the affected side using the supine roll test, and may involve the Barbecue roll maneuver or Gufoni maneuver for the geotropic variant, according to the American Academy of Otolaryngology-Head and Neck Surgery 4

The American Academy of Otolaryngology-Head and Neck Surgery advises avoiding routine use of vestibular suppressant medications (antihistamines, benzodiazepines) for BPPV as they may delay central compensation 1
Patients with persistent symptoms should be reassessed within one month to document resolution or persistence, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 1
Exercise caution when performing diagnostic maneuvers in patients with cervical stenosis, severe kyphoscoliosis, limited cervical range of motion, or other conditions that limit head movement, according to the American Academy of Otolaryngology-Head and Neck Surgery 7

The American Academy of Otolaryngology-Head and Neck Surgery recommends reassessing patients within 1 month after initial treatment to document resolution or persistence of symptoms 1
If symptoms persist, evaluate for unresolved BPPV or alternative diagnoses, as suggested by the American Academy of Otolaryngology-Head and Neck Surgery 1