Abstract

To demonstrate that the obstructed vascular lumen of the experimentally induced branch retinal vein occlusion (BRVO) induces retrograde blood flow, resulting in flow from the occluded vein to the feeder arterioles.Photocoagulation was used to create occlusion of the branch retinal vein in a monkey model (n = 2; 1 cynomolgus, 1 rhesus). Twenty-four hours following photocoagulation, the eyes were examined for evidence of vascular occlusive disease. Vascular occlusion was proven by fluorescent vesicle angiography with scanning laser ophthalmoscopy; these results were recorded to SVHS videotape. The images were then serially analyzed frame by frame to track individual microsphere movement.The authors observed retrograde flow proximal to the point of vessel obstruction and extending backward into the arterial system.This demonstrates the existence of retrograde flow in an experimental model of BRVO and might explain vascular complications seen in this disease process.

View details for Web of Science ID 000074746500009

View details for PubMedID 9674011