Distinctive vascular changes in the retina and choroid linked to retrograde flow in the ophthalmic artery due to chronic total occlusion of the carotid artery - Summary - MDSpire
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Distinctive vascular changes in the retina and choroid linked to retrograde flow in the ophthalmic artery due to chronic total occlusion of the carotid artery
To characterize the vascular alterations in the retina and choroid associated with retrograde flow in the ophthalmic artery due to chronic total occlusion of the carotid artery, highlighting its significance in understanding ocular vascular changes.
Key Findings:
Retinal VLD was significantly lower in CTO eyes compared to CAS and control eyes, indicating severe microvascular loss.
Choroidal parameters were relatively preserved in CTO compared to CAS, suggesting compensatory mechanisms.
Ipsilateral CTO eyes showed reduced retinal VLD compared to contralateral eyes, emphasizing the impact of hemodynamic changes.
Retrograde OA flow in CTO was associated with lower retinal VLD but higher choroidal vascular volume (CVV) and vascular index (CVI), indicating divergent vascular responses.
Interpretation:
Retrograde OA flow in CTO leads to more severe retinal microvascular loss while paradoxically expanding choroidal vascularity, indicating distinct hemodynamic responses in the ocular circulations.
Limitations:
Study focused on a specific population and may not generalize to all patients with carotid occlusive disease, introducing potential selection bias.
Cross-sectional design limits causal inferences, necessitating further longitudinal studies.
Conclusion:
The findings underscore the importance of OCTA-derived metrics as noninvasive biomarkers for assessing collateral-dependent perfusion in carotid occlusive disease, with significant clinical implications.
