Benign paroxysmal positional vertigo

Disease Description (Causes and Symptoms)

• Summary of definition: Benign paroxysmal positional vertigo (BPPV) is characterized by brief, recurrent episodes of spinning dizziness (lasting from a few seconds to about 1 minute) triggered by changes in head position.
• Pathophysiology (brief): Otoconia (calcium carbonate crystals in the ear) in the inner ear move into the semicircular canals, particularly the posterior semicircular canal, causing rotational stimulation. The condition is mainly explained by canalithiasis (free-floating particles in the canal) or cupulolithiasis (particles attached to the cupula).
• Main symptoms: A spinning sensation (rotational dizziness), nystagmus (in certain positions), nausea and vomiting, and balance problems. Symptoms are usually triggered by changes in position (lying down → turning over, turning the head, looking upward, etc.) and disappear after lasting for several to several tens of seconds. A heavy-headed feeling and residual imbalance may remain even between episodes.
• Risk factors/triggering factors: Age (more common after the 40s–50s), head trauma, osteoporosis or low bone density, prolonged bed rest, and after otolaryngologic surgery or viral vestibular neuritis.

Treatment Methods

• Basic principle: The standard and preferred treatment is to physically reposition the cause of the symptoms (the otoconia) back to its original location in the vestibular organs containing hair cells.
• Non-pharmacological treatment (主要)
  • Epley maneuver: A standard, evidence-based treatment for posterior semicircular canal BPPV. It moves the otoconia through a series of rotational positions.
  • Semont maneuver: Used for posterior semicircular canal cupulolithiasis.
  • Lempert (BBQ roll), Gufoni, etc.: Rotational/repositioning maneuvers used for lateral (horizontal) semicircular canal BPPV.
  • Brandt-Daroff exercises: Used as an adjunct for self-relief through repeated positional training (applied as rehabilitation in cases of treatment failure or recurrence).
• Medication
  • For short-term symptom relief: Antihistamines (e.g., meclizine), benzodiazepines (for dizziness relief), and antiemetics (e.g., metoclopramide). However, these are not definitive treatments, so long-term use is not recommended (particularly because it can interfere with rehabilitation).
• Procedures and surgery
  • Unnecessary for most patients. In rare cases of recurrence or treatment resistance, posterior canal occlusion may be considered (limited because of the risk of vestibular function impairment).
• Lifestyle management and precautions
  • In the early stage, avoid activities that are dangerous because of dizziness, such as driving and working at heights.
  • There is a risk of recurrence: If symptoms recur, reevaluation and repeat repositioning treatment are recommended.
  • Avoid prolonged use of sedatives (it may delay readaptation of balance).

Checklist Before an Outpatient Visit (Items to Prepare and Things to Confirm)

• Items to prepare/bring
  • A list of medications currently being taken (especially anticoagulants, psychiatric medications, sedatives, etc.)
  • Bring any previous test results (such as recent MRI, hearing tests, or balance tests) or otolaryngology records, if available
  • Symptom record: time of onset, duration (seconds/minutes), positions that trigger symptoms, and accompanying symptoms (nausea, vomiting, headache, hearing loss, etc.)
  • An accompanying person, if possible (dizziness may make it difficult to return home after the visit)
• Main points the doctor may ask about during the outpatient visit
  • When the dizziness began, its frequency, triggering positions, and duration
  • Whether there has been recent head trauma and whether there are other neurological symptoms (visual disturbances, speech difficulties, weakness in the arms or legs, etc.)
  • Previous treatment experiences (such as the Epley maneuver) and responses

Examples of General Questions to Ask the Doctor

• "Is my dizziness definitely BPPV? What is the possibility of another brain or ear disorder?"
• "How will the repositioning maneuver you recommend (such as the Epley maneuver) be performed, and what are the approximate success rate and number of treatments required?"
• "Do I need to take any medication temporarily to relieve the symptoms? What are the side effects?"
• "When can I resume daily activities such as driving, going to work, and exercising?"

Examples of Disease-Specific Questions

• "Can you determine which semicircular canal (posterior/horizontal/anterior) is affected? Which maneuver will you use based on that?"
• "If symptoms remain or recur after the first attempt with the Epley or Lempert maneuver, what will the next-step treatment (repeat maneuver, rehabilitation, surgery, etc.) be?"

Additional (Summary of Clinical Considerations)

• If the diagnosis is unclear, dizziness persists (for several hours or longer) or progresses, or neurological abnormalities (limb weakness, visual disturbances, slurred speech, persistent asymmetric eye movements, etc.) are present, immediate imaging evaluation (vascular imaging and MRI) is needed to rule out stroke or a central cause.
• The prognosis is generally good, but recurrence is common (although annual recurrence rates vary across the literature, recurrence is possible in a substantial number of patients).