Electroretinographic Findings in Patients with Branch Retinal Vein Occlusion. |
Jaeki Shim, Hokyun Cho |
Department of Ophthalmology, College of Medicine, Chung-Ang University, Seoul, Korea. |
망막분지정맥폐쇄 환자에 있어서의 망막전위도 소견 |
심재기(Jae Ki Shirn),조호균(Ho Kyun Cho) |
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Abstract |
To evaluate the electroretinographic findings in cases of branch retinal vein occlusion(BRVO), Electroretinogram(ERG) were performed according to ISCEV(International Society for Clinical Electrophysiology of Vision) protocol in 17 unilateral BRVO patients. According to fluorescein angiographic acute stage group, hemorrhagic area of fundus was evaluated from retinal photo obtained by fundus camera. And correlation between hemorrhagic area and ERG was evaluated In acute stage group, the b-wave amplitude and b/a ratio of scotopic maximal combined response and oscillatory potential were significantly decreased at the affected eye compared unaffected eye. These findings were not found in chronic stage group. The relationship between hemorrhagic area and ERG finding was not detected in acute stage group. ERG findings in the acute stage of BRVO show that main pathologic lesion of BRVO is located in the inner retinal layer and inner retinal circulation. With further follow-up study, It is possible to use ERG data as a predictor of the course of BRVO. |
Key Words:
b amplitude;b/a ratio;Branched retinal vein occlusion;Electroretinogram;Oscillatory potentials |
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