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KMID : 0616620090150010033
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Journal of Soonchunhyang Medical College
2009 Volume.15 No. 1 p.33 ~ p.40
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Electroretinographic Findings in Patients with Central Retinal Vein Occlusion
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Sok Chenda
Ohn Young-Hoon
Park Joo-Youn
Lee Yong-Jun
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Abstract
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Background:To evaluate the electroretinbgraphic relsuts and to assess the role of electroretonogram(ERG) in cases of central retinal vein occlusion (CRVO).
Methods:ERGS were recorded on 21 patients who were diagnosed as CRVO with the mothod recommended by international society for clinical electrophysiology of vision (ISCEV) using Leight Krossowsky Chen (LKC) UTAS E-3000, The patients were classified as ischemic and non-ischemic CRVOs by the findings of fluorescein angiogaphy (FAG) and ocular physical examination. ERG results of the involved eyes were analyzed and compared with the findings of contralateral eyes.
Results:’The b-wave implicit time and amplitude of scotopic 0.01, a- and b-wave implicit time, b-wave amplitude of scotopic 3.0, a- and b-wave implicit time , b-wave amplitude of photopic 3,0, implicit time and photopic 3.0 flicker amplitude showed statistically significant differences in involved eyes comparing with the normal eyes (p (0.05). The a-wave implicit time, b-wave amplitude of scotopic 3.0, a-wave implicit time, b-wave amplitude of photopic 3.0, photopic 3.0 flicker amplitude showed statistically significant difference in ischemic type comparing with the non-ischemic type (p (0.05).
Conclusions:It is likely that the b-wave amplitude, a-wave implicit time of scotopic 3.0 and photopic 3.0 are more sensitives than other ERG parameters. These results suggested that ERG may be a useful method to classify the disease and to assess the prognosis in CRVO.
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KEYWORD
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Central retinal vein occlusion(CRVO), Electroretinogram(ERG), Neovascularization,
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