Occlusion of the central retinal vein (CRVO); hemiretinal occlusion (HRVO) occurs when the superior and inferior retinal drainage does not merge into a central retinal vein (20%) and is occluded (more like CRVO than BRVO). Two types: < 10 disc areas of capillary nonperfusion on fluorescein angiogram.

BRVO is a venous occlusion at any branch of the central retinal vein. Occlusions occurring at the proximal part of the central retinal vein trunk results in an HRVO, which is considered a subtype of either CRVO or BRVO.

2013年11月1日 · Second only to diabetic retinopathy as a leading cause of retinal vascular blindness, retinal vein occlusion (RVO) is often linked with systemic risk factors such as hypertension, arteriosclerosis, diabetes, and smoking and …

Hemiretinal vein occlusion (HRVO) affects either the superior or inferior retinal hemisphere, and the retinal haemorrhages are nearly equal in two altitudinal quadrants (the nasal and temporal aspects) of the involved hemisphere.

To characterize hemi-retinal vein occlusion (HRVO) in patients presenting to a multi-tier ophthalmology hospital network. This retrospective, hospital-based study analyzed 2,834,616 new patients between August 2010 and June 2021. Patients with a clinical diagnosis of HRVO in at least one eye were included as cases.

Retinal vein occlusion (RVO) is the most common retinal vascular disease after diabetic retinopathy. 1 Depending on the area of retinal venous drainage effectively occluded it is broadly classified as either central retinal vein occlusion (CRVO), hemispheric retinal vein occlusion (HRVO), or branch retinal vein occlusion (BRVO).

HRVO eyes improved to match BRVO eyes from soon after treatment started through 12 months. Mean change in VA was greater in HRVO (+16.4) than both BRVO (+11.4; p=0.006) and CRVO (+8.5; p<0.001). Mean change in CST in HRVO (−231 µm) was similar to CRVO (−259 µm; p=0.33) but greater than BRVO eyes (−151 µm; p=0.003).

2024年7月9日 · Retinal vein occlusion (RVO) frequently presents as sudden, painless, unilateral vision loss. Most affected patients are aged >65 years. Hypertension, diabetes mellitus, atherosclerosis, and glaucoma are major risk factors for the development of central retinal vein occlusion (CRVO) or branch retinal vein occlusion (BRVO) in older patients.

Patients may notice sudden or gradual painless loss of vision or visual field defect. The two main vision-threatening complications are macular oedema and retinal ischaemia. This Clinical Management Guideline outlines the aetiology, signs and symptoms and evidence-based recommendations for diagnosing retinal vein occlusions.

1998年5月1日 · The authors identified 79 patients with hemiretinal vein occlusion (HRVO), 258 patients with central retinal vein occlusion (CRVO), 270 patients with branch retinal vein occlusion (BRVO), and 1142 control subjects at 5 clinical centers.