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    Benign positional vertigo

    Vertigo - positional; Benign paroxysmal positional vertigo; BPPV

    Benign positional vertigo is a condition in which a person develops a sudden sensation of spinning, usually when moving the head. It is the most common cause of vertigo.

    Causes

    Benign positional vertigo is due to a disturbance within the inner ear. The inner ear has fluid-filled tubes called semicircular canals. The canals are very sensitive to movement of the fluid, which occurs as you change position. The fluid movement allows your brain to interpret your body's position and maintain your balance.

    Benign positional vertigo develops when a small piece of bone-like calcium breaks free and floats within the tube of the inner ear. This sends the brain confusing messages about your body's position.

    There are no major risk factors. However, the condition may partly run in families. A prior head injury (even a slight bump to the head) or an inner ear infection called labyrinthitis may make some people more likely to develop the condition.

    Symptoms

    People with this condition feel as though they are spinning or moving, or that the world is spinning around them. They may experience:

    • Nausea, vomiting, hearing loss, and a loss of balance
    • Vision problems, such as a feeling that things are jumping or moving

    The spinning sensation:

    • Is usually triggered by moving the head
    • Often starts suddenly
    • Lasts a few seconds to minutes

    Most often, patients say the spinning feeling is triggered when they roll over in bed or tilt their head up to look at something.

    Exams and Tests

    To diagnose benign positional vertigo, the health care provider will often perform a test called the Dix-Hallpike maneuver.

    • The health care provider holds your head in a certain position and asks you to lie quickly backward over a table.
    • As you do this, the health care provider will look for abnormal eye movements and ask if you feel a spinning sensation. The doctor may use different methods to help evaluate your eye movements.

    A physical exam should otherwise be normal. A complete medical history and careful brain and nervous system (neurological) exam should be done to rule out other reasons for your symptoms.

    Tests that may be done include:

    • EEG
    • Electronystagmography (ENG)
    • Head CT
    • Head MRI
    • Hearing test
    • Magnetic resonance angiography of the head
    • Warming and cooling the inner ear with water (caloric stimulation) or air to test eye movements

    Treatment

    The most effective treatment is a procedure called "Epley's maneuver," which can move the small piece of bone-like calcium that is floating inside your inner ear. Other exercises that can readjust your response to head movements are less effective.

    Occasionally, medications may be prescribed to relieve the spinning sensations. Such drugs may include:

    • Antihistamines
    • Anticholinergics
    • Sedative-hypnotics

    However, these medicines often do not work very well for treating vertigo.

    To prevent your symptoms from getting worse during episodes of vertigo, avoid the positions that trigger it.

    Outlook (Prognosis)

    Benign positional vertigo is uncomfortable, but usually improves with time. This condition may occur again without warning.

    Possible Complications

    Patients with severe vertigo may get dehydrated due to frequent vomiting.

    When to Contact a Medical Professional

    Call your health care provider if:

    • You develop vertigo
    • Treatment for vertigo has not worked
    • You develop symptoms such as weakness, slurred speech, or vision problems that may be signs of a more serious condition

    Prevention

    Avoid head positions that trigger positional vertigo.

    References

    Crane BT, Schessel DA, Nedzelski J, Minor LB. Peripheral vestibular disorders. In: Cummings CW, Flint PW, Haughey BH, et al, eds. Otolaryngology: Head & Neck Surgery. 5th ed. Philadelphia, Pa: Mosby Elsevier; 2010:chap 165.

    Post RE, Dickerson LM. Dizziness: a diagnostic approach. Am Fam Physician. 2010;82:361-369.

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              Tests for Benign positional vertigo

              Review Date: 8/31/2011

              Reviewed By: David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc., and Seth Schwartz, MD, MPH, Otolaryngologist, Virginia Mason Medical Center, Seattle, Washington.

              The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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