Central Retinal Vein Occlusion

Central Retinal Vein Occlusion is a topic covered in the 5-Minute Emergency Consult.

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Basics

Description

Disease characterized by decreased visual acuity resulting from venous occlusion of any etiology

Etiology

  • Ischemic CRVO:
    • 20–25% of cases
    • Blocked venous return leads to backflow in capillaries, hemorrhage, and macular edema.
    • Limited space at lamina cribrosa predisposes to thrombosis due to slow flow and vessel wall changes
    • Theorize that arteriosclerotic changes in the adjacent artery may impinge upon the vein.
    • Blood viscosity also thought to play a role
  • Nonischemic CRVO:
    • Milder, incomplete occlusion

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Citation

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TY - ELEC T1 - Central Retinal Vein Occlusion ID - 307703 Y1 - 2016 PB - 5-Minute Emergency Consult UR - https://emergency.unboundmedicine.com/emergency/view/5-Minute_Emergency_Consult/307703/all/Central_Retinal_Vein_Occlusion ER -