Central retinal vein occlusion, unspecified eye. The 2019 edition of ICD-10-CM H34.819 became effective on October 1, 2018. This is the American ICD-10-CM version of H34.819 - other international versions of ICD-10 H34.819 may differ.
Central retinal vein occlusion is an occlusion of the main retinal vein posterior to the lamina cribrosa of the optic nerve and is typically caused by thrombosis. Central retinal vein occlusion is further divided into two categories: non-ischemic (perfused) and ischemic (nonperfused).
Purpose: Central retinal artery occlusion (CRAO) is a form of acute ischemic stroke that causes severe visual loss and is a harbinger of further cerebrovascular and cardiovascular events.
WHAT IS MACULAR EDEMA FOLLOWING CENTRAL RETINAL VEIN OCCLUSION (MEfCRVO)? CRVO occurs when the central retinal vein becomes blocked. MEfCRVO occurs when fluid leaks into the macula as a result of the blocked central retinal vein. CRVO makes up 2 out of every 10 diagnosed cases of RVO.
CRVO is caused by blockage in the main vein that drains the retinal vasculature, whereas a BRVO is caused by a blockage in a smaller vein that drains a portion of the retinal vasculature.
Branch retinal artery occlusion describes decreased arterial blood flow to the retina leading to ischemic damage. The severity of visual loss depends upon the area of retinal tissue affected by the vascular occlusion.
Non-ischemic CRVO—a milder type characterized by leaky retinal vessels with macular edema. Ischemic CRVO—a more severe type with closed-off small retinal blood vessels.
A retinal vein occlusion (RVO) is when one of the veins in the retina becomes blocked. You may experience varying degrees of vision loss with RVO, depending on the severity and location of the blockage. Vision loss can be significant, especially if it affects the central part of the retina (macula).