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Related Experiment Videos

Collateral circulation in hemicentral retinal vein occlusion.

R Sabates, A Jalkh, H M Freeman

    Annals of Ophthalmology
    |July 1, 1983
    PubMed
    Summary

    A rare hemicentral retinal vein occlusion allowed observation of slow collateral circulation development. This optic disc collateral draining into a choroidal vein, previously only seen histologically, did not prevent macular changes.

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    Area of Science:

    • Ophthalmology
    • Vascular Biology
    • Retinal Diseases

    Background:

    • Hemicentral retinal vein occlusion (HCRVO) can lead to complications like macular edema.
    • Understanding collateral circulation is crucial for managing retinal vascular occlusive events.
    • Lightly pigmented fundi offer unique opportunities for observing vascular dynamics.

    Observation:

    • The study observed the development of collateral circulation following a spontaneous HCRVO.
    • The patient's lightly pigmented fundus facilitated detailed visualization of vascular changes.
    • The collateral pathway involved an optic disc vessel draining into a choroidal vein.

    Findings:

    • Demonstrated a novel optic disc to choroidal vein collateral in a live patient, previously only known from histological studies.
    • Observed slow development of collateral circulation over several months.
    • The developed collateral circulation was insufficient to prevent chronic microcystic macular changes.

    Implications:

    • Provides in vivo evidence of optic disc-choroidal venous collaterals in HCRVO.
    • Highlights the slow compensatory mechanisms in retinal vascular disease.
    • Suggests that collateral formation may not always be protective against long-term macular damage.

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