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Related Experiment Videos

Visual loss "at stool".

R M Burde

    Survey of Ophthalmology
    |November 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

    A giant aneurysm of the anterior communicating artery caused sudden vision and consciousness loss during a Valsalva maneuver. Surgical clipping successfully restored the patient's vision.

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    Area of Science:

    • Neurology
    • Ophthalmology
    • Neurosurgery

    Background:

    • Giant aneurysms, particularly of the anterior communicating artery (ACoA), can present with diverse neurological and visual symptoms.
    • The Valsalva maneuver can precipitate symptoms in patients with intracranial pathology due to transient increases in intrathoracic and intracranial pressure.

    Observation:

    • A 25-year-old male experienced syncope and profound right eye vision loss during a Valsalva maneuver.
    • Ophthalmic examination revealed no light perception (NLP) in the right eye with absent visual evoked potentials (VEPs).

    Findings:

    • A giant aneurysm of the anterior communicating artery was identified as the cause of the patient's symptoms.
    • The aneurysm was surgically treated with direct clipping via a pterional craniotomy.

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    Implications:

    • This case highlights the potential for ACoA aneurysms to cause acute visual deficits.
    • Successful surgical intervention can lead to significant visual recovery, even in cases of profound initial vision loss.
    • The Valsalva maneuver can be a critical trigger for symptom presentation in patients with specific cerebrovascular conditions.