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A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...
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Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition
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[Vascular transient monocular visual loss].

C Cochard-Marianowski1, C Lamirel, V Biousse

  • 1Service d'ophtalmologie, CHU Morvan, 5 avenue Foch, Brest, France. catherine.marianowski@chu-brest.fr

Journal Francais D'Ophtalmologie
|November 27, 2009
PubMed
Summary
This summary is machine-generated.

Transient monocular visual loss requires emergency care. Prompt evaluation and management of vascular risk factors are crucial to prevent permanent vision loss and systemic events.

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Area of Science:

  • Ophthalmology
  • Neurology
  • Vascular Medicine

Context:

  • Transient monocular visual loss (TMcDonald) is an ophthalmic emergency.
  • Ocular causes are managed by ophthalmologists.
  • Vascular causes necessitate broader evaluation.

Purpose:

  • To outline the diagnostic and management principles for transient monocular visual loss.
  • To emphasize the importance of secondary prevention strategies.

Summary:

  • Vascular TMcDonald stems from emboli, hypoperfusion, vasospasm, or venous congestion.
  • Evaluation involves assessing carotid and ophthalmic arteries, aorta, heart, and hypercoagulable states.
  • Management focuses on aggressive risk factor treatment, typically with antiplatelet agents.

Impact:

  • Effective management prevents permanent vision loss.
  • Secondary prevention reduces risks of cerebral ischemia and cardiovascular death.
  • Anticoagulation and carotid surgery are rarely indicated.