The Effect Of A Second Isolated Retinal Artery In Branch Retinal Vein Obstruction

Purpose:Branch retinal vein obstruction (BRVO) is a common vascular disorder. Usually occurs in the elderly with hypertension, arterios-clerosis, diabetes and blood viscosity and other systemic diseases.Branch retinal vein occlusion in the pathogenesis of multiple factors involved in the pathophysiological process, not yet fully understood. The role of "the second isolated retinal artery" in the branch retinal vein occlusion (BRVO) that few reported in the literature.To evaluate a second retinal artery in eyes with and without branch retinal vein obstruction (BRVO).Methods:Randomly selected from of 130 patients (260 eyes),they treated in March 2008 to October 2009 at the First Affiliated Hospital of Dalian Medical University.65 patients with BRVO(130 eyes), and 65 patients with other non-vascular ophthalmology diseases(130 eyes).We checked and grouped their fundus color photography and fluorescein angiography (FFA). The eyes with BRVO (65 eyes) into group 1, the follow eyes (65 eyes) into group 2, the eyes with other non-vascular ophthalmology diseases (130 eyes) into group 3. The Group 1, according to with and without "second isolated retinal artery" is divided into group a and group b. Recorded the number of "the second isolated retinal artery" The initial visual acuity (VA) of the group a and the group b and followed up 1 week,1 month,3 months and 6 months were recorded and were analyzed statistically.Results:1, BRVO eyes (8 of 65,12%) compared to the follow eyes (14 of 65,22%), the existence of "a second isolated retinal artery" no significant difference in the number,χ2= 1.96 (P> 0.05); BRVO eyes (8 of 65,12%) compared to the eyes with other non-vascular ophthalmology diseases (44 of 130,34%), existence of "the second isolated retinal artery," the statistically significant was found between the groups,χ2= 10.23 (P <0.05).2, in the group of BRVO eyes (that is, group a and group b), with and without "the second isolated retinal artery," their initial visual acuity (VA) was statistically significant difference(P<0.05). The VA of 1 week, 1,3,6 month were also compared. There were also significant differences in the VA between group a and group b. (P<0.05).Conclusions:"The second isolated retinal artery" may reduce the number of arteriovenous crossings, and indirectly improve the initial visual acuity of the eyes with BRVO. "The second isolated retinal artery" may play a protective role in BRVO.