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17 Cards in this Set
- Front
- Back
What percentage of vertigo is peripheral?
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Vertigo is peripheral in ninety-three percent of primary care patients
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What are the most common causes of peripheral vertigo?
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Peripheral -
Benign paroxysmal positional vertigo, acute vestibular neuronitis, and Ménière’s disease |
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Nystagmus that does not lessen when the patient focuses.
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Central vertigo
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Has a more sudden onset. Rotatory illusions. Nausea or vomiting accompanies the vertigo. Central or peripheral vertigo?
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Peripheral vertigo
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Dix Hallpike maneuver produces horizontal and rotational nystagmus that typically wanes with repeated maneuvers or when the
patient focuses the gaze. Nystagmus is triggered by some provoking factor. Central or peripheral vertigo? |
Peripheral vertigo
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Nystagmus is purely horizontal, vertical,
or rotational, does not lessen when the patient focuses the gaze. persists for a longer period. Central or peripheral vertigo? |
Central vertigo
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Dix Hallpike maneuver
provokes purely vertical (usually downbeat) or torsional nystagmus without a latent period of at least a few seconds, and does not wane with repeated maneuvers. Central or peripheral vertigo? |
Central vertigo
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Acute vestibular neuronitis - how does the vertigo present over days?
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vertigo initial symptoms typically are
severe but lessen over the next few days. |
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Ménière’s disease vertigo - how does the vertigo present over days?
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Attacks of vertigo initially
increase in severity, then lessen in severity later on. |
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BPPV vertigo characteristics
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symptoms occur only with positional changes, such as turning over in bed, bending over at the waist and
then straightening up, or hyperextending the neck |
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Benign positional paroxysmal
vertigo - definition and cause |
Transient episodes of vertigo caused by stimulation of vestibular sense organs by canalith; affects middle-age and older patients;
affects twice as many women as men |
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Ménière’s disease (endolymphatic hydrops) - definition and cause
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Recurrent episodes of vertigo, hearing loss, tinnitus, or aural
fullness caused by increased volume of endolymph in the semicircular canals |
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Weakness, dysarthria, vision or hearing changes, paresthesia, altered level of consciousness,
ataxia, or other changes in sensory and motor function. Central or peripheral vertigo? |
Central vertigo?
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Vertical nystagmus is 80 percent
sensitive for what causes of vertigo. |
Vestibular nuclear or cerebellar
vermis lesions. |
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Spontaneous horizontal nystagmus with or without rotatory nystagmus
is consistent with? |
Acute vestibular neuronitis.
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Patients have more severe instability and often cannot walk or even stand without falling. Central or peripheral vertigo?
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Central vertigo
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How useful is the Dix-Hallpike maneuverin diagnosing BPPV?
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The positive predictive value of 83 percent and a negative predictive value of 52 percent for the
diagnosis of BPPV. |