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  • Title: Retreatment with anti-vascular endothelial growth factor therapy based on changes in visual acuity after initial stabilization of neovascular age-related macular degeneration: 3-year follow-up results.
    Author: Dunavoelgyi R, Sacu S, Eibenberger K, Palkovits S, Leydolt C, Pruente C, Schmidt-Erfurth U.
    Journal: Retina; 2012 Sep; 32(8):1471-9. PubMed ID: 22414958.
    Abstract:
    PURPOSE: To evaluate the 3-year therapeutic benefit of intravitreal bevacizumab in neovascular related macular degeneration (nAMD) in a standard clinical setting involving 3 initial injections and a pro re nata regimen as recommended in the PRONTO study. METHODS: In this interventional clinical study, 181 eyes of 160 consecutive patients with active neovascular related macular degeneration meeting recommended criteria for inclusion and protocol criteria for anti-vascular endothelial growth factor therapy undergoing intravitreal bevacizumab monotherapy were observed. Data of treatment-naive eyes (Group 1, n = 114) were analyzed separately from eyes that had undergone previous photodynamic therapy plus intravitreal triamcinolone (Group 2, n = 67). Re-treatment criteria were based on clinical outcome following the official European label regimen. After 1 year of continuous service at an academic referral center, follow-up was performed in private practices in collaboration with the referral center. Main outcome parameters were best-corrected visual acuity and central retinal thickness. RESULTS: After 3 years, best-corrected visual acuity decreased in the overall population (0.23 ± 0.16 to 0.16 ± 0.21. P = 0.002) and in both groups compared with baseline (0.24 ± 0.21 to 0.17 ± 0.21, Group 1, P = 0.03; 0.22 ± 0.19 to 0.16 ± 0.21, Group 2, P > 0.05), whereas central retinal thickness increased in the overall population (291 ± 92 to 319 ± 110 μm, P = 0.01) and in both groups (291 ± 96 to 325 ± 117 μm, Group 1, P > 0.05; 290 ± 83 to 308 ± 96 μm, Group 2, P > 0.05) because of chronic cystic degeneration changes of the macula. Mean treatment rate was 5.1 ± 3.9 (Group 1) versus 3.7 ± 2.7 (Group 2, P = 0.01). Five cases of severe intraocular inflammation after intravitreal bevacizumab were documented. DISCUSSION: While the functional and morphological benefits persisted for the first year after intravitreal bevacizumab treatment, after this time both functional and morphologic results were disappointing during long-term follow-up with visual acuity loss as the main retreatment criterion. After stabilization of the disease, a monthly follow-up of optical coherence tomography and re-treatment based on morphologic, clinical, and vision outcomes may increase the efficacy in patients with neovascular related macular degeneration under anti-vascular endothelial growth factor treatment.
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