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Related Experiment Videos

Pattern shift visual evoked response in carotid occlusion

E Robertson, R G Feldman

    Clinical EEG (Electroencephalography)
    |April 1, 1980
    PubMed
    Summary
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    Pattern shift visual evoked response (PSVER) testing can detect optic nerve issues. Abnormal PSVER in a patient with carotid artery occlusion suggests it may indicate internal carotid artery disease.

    Area of Science:

    • Neuroscience
    • Ophthalmology
    • Vascular Neurology

    Background:

    • Pattern shift visual evoked response (PSVER) latency is a sensitive indicator of optic nerve dysfunction.
    • PSVER is useful for detecting demyelinating lesions but can be abnormal in other optic nerve conditions, including ischemic optic neuropathy.

    Observation:

    • A patient with left internal carotid artery occlusion presented with normal ophthalmological findings but abnormal PSVER.
    • The patient's condition was possibly linked to neck trauma.

    Findings:

    • The study suggests subclinical optic nerve ischemia due to reduced ophthalmic artery blood flow as the mechanism for abnormal PSVER.
    • Abnormal PSVER was observed despite a normal ophthalmological examination.

    Implications:

    Related Experiment Videos

    • PSVER may serve as a sensitive, non-invasive indicator for internal carotid artery disease.
    • This finding highlights the potential of PSVER in identifying vascular compromise affecting the optic nerve.