Arteriovenous Crossing Patterns in Branch Retinal Vein Occlusion.

Lee, Hyup; Lee, Kyung Hwa; Lee, Eun Koo

Original Article

Journal of the Korean Ophthalmological Society 1995;36(8):1259-1263.
Published online August 1, 1995.

Arteriovenous Crossing Patterns in Branch Retinal Vein Occlusion.

Hyup Lee, Kyung Hwa Lee, Eun Koo Lee

Department of Ophthalmology, Hangang Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, Korea.

망막분지정맥폐쇄에서의 동정맥교차에 대한 임상적 고찰

이협(Hyup Lee),이경화(Kyung Hwa Lee),이은구(Eun Koo Lee)

Abstract

The study was designed to evaluate the relative anatomic position of the crossing vessels at the site of occlusion in eyes with branch retinal vein occlusion(BRVO). Fluorescein angiography and fundus photography of 33 eyes(33 patients) with BRVO were used to examine the relative position of artery and vein at occluded crossings. Three separate comparison groups were formed by identifying corresponding arteriovenous crossings for each occluded crossing in: (1) the ipsilateral but opposite vessel arcade within eyes affected by BRVO patients; (2) the same quadrant in unaffected eyes of BRVO patients; and (3) the same quadrant in eyes of patients without BRVO, matched by age and sex with the BRVO patients. The site of obstruction of the branch vein was an arteriovenous crossing in all affected eyes. In 97% of eyes with BRVO, the artery was located anterior to the vein at the obstructed site. In the three comparison groups the artery was anterior to the vein in 73%, 68%, 59% of the crossings, respectively, yielding statistically significant differances for first group(P<0.02), second graup(P<0.01) and third group(P<0.001) of control crossings compared with BRVO crossings.

Key Words: Branch Retinal Vein Occlusion(BRVO)