Bonneric J-G, Boissonnot M, Rovira J-C, Dighiero P
Service d'Ophtalmologie, Centre Hospitalier Universitaire, Poitiers.
J Fr Ophtalmol. 2007 Mar;30(3):e8. doi: 10.1016/s0181-5512(07)89592-1.
Preretinal arterial loops are congenital vascular anomalies that originate from a main branch of the central retinal artery on the optic disc. These arterial loops are usually unilateral and asymptomatic, but they can be associated with retinal artery branch occlusion. We report one case of inferior temporal retinal artery occlusion in a patient with preretinal arterial loops. Two different mechanisms are thought to be the cause of occlusion: twisting of the loop or thrombosis.
视网膜前动脉环是一种先天性血管异常，起源于视盘上视网膜中央动脉的一个主要分支。这些动脉环通常为单侧且无症状，但可与视网膜动脉分支阻塞相关。我们报告1例伴有视网膜前动脉环的颞下视网膜动脉阻塞患者。两种不同机制被认为是阻塞的原因：动脉环扭转或血栓形成。
