arteriovenous nicking

ar·te·ri·o·ve·nous nick·ing

constriction of a retinal vein at an artery-vein crossing.
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The photos were checked for four types of retinopathy: arteriovenous nicking, focal arteriolar narrowing, retinal microaneurysms, and retinal hemorrhage.
About 15% had focal arteriolar narrowing, 14% had arteriovenous nicking, and 7% had other microvascular abnormalities such as hemorrhages, exudates, and microaneurysms.
Approximately 15% were found to have focal arteriolar narrowing, 14% to have arteriovenous nicking, and 7% to have other microvascular abnormalities such as hemorrhages, exudates, and microaneurysms.