Geometric Decomposition of OCT Angiography in RVO: Unmasking Congestive Versus Compensatory Phenotypes and Deep Retina-Choroid Coupling - PubMed
6 hours ago
- #Microvascular Remodeling
- #Retinal Vein Occlusion
- #OCT Angiography
- The study uses geometric decomposition of OCT angiography to analyze retinal vein occlusion (RVO), distinguishing between 'congestive' and 'compensatory' microvascular phenotypes and assessing retina-choroid coupling.
- In fellow eyes, 'inefficient compensation' was observed in the deep capillary plexus (DCP) with increased vessel length density (VLD) and decreased vessel diameter index (VDI), indicating subclinical compensatory remodeling missed by conventional vessel density analysis.
- Affected eyes showed 'congestive failure' with decreased VLD and increased VDI, and DCP ischemia was strongly correlated with macular edema severity (total retinal thickness).
- A disease gradient in retina-choroid coupling was identified, with stronger correlations between DCP and choroidal vascularity in affected eyes, suggesting progressive synchronization of deep retinal and choroidal degeneration in RVO.
- Sensitivity analysis revealed a biphasic sequence in retina-choroid coupling: temporary functional decoupling in mild edema, followed by pathologic synchronization in severe congestive disease, indicating a collapse of neurovascular autoregulation.
- The findings suggest RVO is a bilateral, hierarchical disorder, and decomposing vessel density into length and diameter provides better biomarkers for early detection and monitoring of congestive status in RVO eyes.