What causes BPPV?

BPPV, or Benign Paroxysmal Positional Vertigo, is attributed to dislodging tiny calcium crystals, known as otoconia, from their usual position within the utricle, a sensory organ in the inner ear.

When these otoconia become detached and float freely, they can drift through fluid-filled spaces within the inner ear, including the semicircular canals (SCCs), which detect head movement. Occasionally, these otoconia may find their way into one of the SCCs, typically the posterior one, due to their gravitational orientation in the lower part of the middle ear.

Otoconia generally remains unproblematic within the SCC once the individual's head undergoes positional changes, such as turning from side to side, transitioning from sitting to lying down, sitting up from a reclined position, or lying down while sleeping. During these movements, the otoconia are displaced within the canal, causing fluid movement inside the SCC and stimulating the balance (eighth cranial) nerve. This stimulation can lead to symptoms like vertigo and nystagmus, characterized by involuntary eye movement.

Symptoms of BPPV

Individuals afflicted with BPPV often experience intense spinning sensations, known as vertigo, when they alter the position of their head. This can be particularly distressing and may lead to falls or a loss of balance when getting out of bed or attempting to walk. Tilting the crown forward or backward while walking can also trigger a loss of balance, resulting in a potential injury. Vertigo can induce severe nausea and vomiting in some individuals.

While vertigo with head position changes is the hallmark symptom of BPPV, many individuals may experience a mild degree of unsteadiness between recurrent vertigo attacks.

The onset of BPPV can be sudden and alarming, often causing individuals to fear being seriously ill, such as having a stroke. A medical diagnosis of BPPV is reassuring, especially when patients understand the available treatments to alleviate their symptoms.

Without intervention, BPPV symptoms typically diminish over days or weeks. In rare cases, symptoms may persist for an extended period.

Why is it called BPPV?

There is no specific trigger for BPPV for many individuals, particularly older adults. However, certain factors may precipitate an episode, including:

1.     Head injuries range from mild to severe.

2.     Prolonged periods with the head held fixed, such as during dental or salon treatments or while confined to bed rest.

3.     Riding a bike on rough terrain.

4.     Engaging in high-intensity aerobic activities.

5.     Other ear conditions, including ischemic and inflammatory disorders.

Diagnosing BPPV

Diagnosing BPPV

his/her head turned 45 degrees to one side. They are then quickly reclined with their head hanging just over the edge of the examination table. This maneuver often induces vertigo, and the physician observes the patient's eye movements for signs of nystagmus. A positive result confirms the presence of BPPV, and further imaging tests such as MRI or CT scans of the brain are usually unnecessary.

A confirmed BPPV diagnosis can reassure patients, especially when they become aware of the available treatments. Typically, BPPV symptoms improve with treatment over several days or weeks, and sometimes they even spontaneously resolve.

Treating BPPV

The Epley Maneuver for BPPV, the most common form of BPPV, characterized by crystals in the posterior semicircular canal, can be effectively treated with the Epley maneuver. This simple and efficient procedure involves repositioning the head to dislodge and reposition the crystals out of the semicircular canal. Sometimes, multiple repositioning tricks are necessary in a single session.

After completing the Epley maneuver, patients should gradually resume walking. They should avoid tilting their heads backward and bending forward (e.g., to tie shoelaces) for several days. Sleeping on the side corresponding to the affected ear should also be avoided.

Different repositioning techniques may be required for BPPV involving other semicircular canals, but the goal remains the same: relocating the crystals out of the affected channel. BPPV affecting the anterior canal is challenging to diagnose and treat because the debris is located in the upper part of the inner ear and may not respond as readily to repositioning.

Other Treatment Options for BPPV

Most individuals do not require medication unless they experience severe nausea or vomiting. In such cases, anti-nausea medication may be prescribed to alleviate symptoms, especially if repositioning techniques are poorly tolerated.

Surgery is rarely necessary for BPPV treatment. In some instances, a surgical procedure to close the posterior semicircular canal may be recommended to prevent further entry and exit of crystals. However, this surgery carries some risk of hearing loss.

For those who experience recurrent episodes of BPPV, home exercises can help manage symptoms independently.