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  • Title: Changes in areas of capillary nonperfusion after intravitreal injection of bevacizumab in eyes with branch retinal vein occlusion.
    Author: Terui T, Kondo M, Sugita T, Ito Y, Kondo N, Ota I, Miyake K, Terasaki H.
    Journal: Retina; 2011 Jun; 31(6):1068-74. PubMed ID: 21451440.
    Abstract:
    PURPOSE: : To study the effect of an intravitreal bevacizumab (IVB) on the retinal ischemia in eyes with a branch retinal vein occlusion. METHODS: : Fluorescein angiography was performed before and 1 month after the IVB (1.25 mg/0.05 mL) in 58 consecutive eyes of 58 patients with macular edema secondary to a branch retinal vein occlusion. The area of capillary nonperfusion was measured on an early-phase fluorescein angiography image by an area measurement program, and the area was expressed relative to the optic disk area (DA). A blockage of the fluorescence by the retinal hemorrhage was distinguished from nonperfusion by comparisons with retinal photographs. RESULTS: : Thirty-seven of 58 eyes did not have any capillary nonperfusion before the IVB, and capillary nonperfusion developed in 3 of these 37 eyes 1 month after the IVB. The area of nonperfusion in these 3 eyes was 0.13, 0.47, and 0.60 DA. Twenty-one of the 58 eyes had capillary nonperfusion before the IVB, and the mean (±SD) area of nonperfusion was 3.45 ± 4.66 DA before the IVB and 3.45 ± 5.19 DA 1 month after the IVB. This change was not significant (P = 0.36). An increase in the area of capillary nonperfusion of >1.0 DA after the IVB was seen in only 1 of all 58 eyes. CONCLUSION: : These results suggest that the incidence of a significant increase in the area of capillary nonperfusion (>1 DA) during the 1 month after the IVB is very low in eyes with branch retinal vein occlusion.
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