Sidrah Riaz, Muhammad Tariq Khan, Zaheer-ud Din Aqil Qazi, Riaz Qadeer, Shahroze Shaukat.
Different Patterns of Retinal Vein Occlusion on Fundus Fluorescein Angiography.
Ophthalmol Update Jan ;15(2):77-81.

Purpose: To study the different patterns of retinal veins occlusion (RVO) on fundus fluorescein angiography (FFA). Materials & Methods: It is a hospital based descriptive study of 33 patients, conducted in Akhtar Saeed Trust Hospital, Ophthalmology Department from February 2014 to October 2016. These patients were selected from outpatient department (OPD) and diagnosed as cases of vein occlusions clinically. Presenting features were sudden painless visual loss, visual field defects, floaters if neovascularization has occurred, flame shaped retinal hemorrhages, dilated tortuous veins in all four quadrants or segmental depending upon it is central or branch vein occlusion. Patients with cataract, vitreous hemorrhage, proliferative diabetic retinopathy and media opacities which impair fundus view were excluded. After informed consent all selected patients were sent for fundus fluorescein angiography (FFA) with intravenous injections of 3ml of 25% and multiple photographs were taken for 20-25 minutes with Topcon digital fundus camera. The pattern of vein occlusions were observed and noted. Results: In this hospital based study 33 patients of vein occlusions, 21 males and 11 females, all with unilateral involvement were included. The age range was 50-75 years with mean age 62.50 years. The duration of visual disturbances on presentation was 2 to 4 weeks from onset of visual symptoms. After clearance of hemorrhages fundus fluorescein angiography (FFA) was performed. Most common site for venous occlusion was superotemporal quadrant seen in 39.40 % cases and non ischemic variety of vein occlusion was more common than ischemic variety. Conclusion: Based on FFA findings non ischemic CRVO was more common as compare to ischemic CRVO. Temporal BRVO`s were seen more commonly as compared to nasal BRVO. Macular edema and leakage was seen in all cases of retinal vein occlusion (RVO).

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