Retinal Neurovascular Changes in Patients With Ischemic Stroke Investigated by Optical Coherence Tomography Angiography

Yingying Liang; Baoyi Liu; Yu Xiao; Xiaomin Zeng; Guanrong Wu; Zijing Du; Ying Fang; Yijun Hu; Xiaohong Yang; Honghua Yu

doi:10.3389/fnagi.2022.834560

Retinal Neurovascular Changes in Patients With Ischemic Stroke Investigated by Optical Coherence Tomography Angiography

Front Aging Neurosci. 2022 Jul 4:14:834560. doi: 10.3389/fnagi.2022.834560. eCollection 2022.

Authors

Yingying Liang¹, Baoyi Liu², Yu Xiao¹, Xiaomin Zeng¹, Guanrong Wu³, Zijing Du¹, Ying Fang¹, Yijun Hu¹, Xiaohong Yang¹, Honghua Yu¹

Affiliations

¹ Guangdong Eye Institute, Department of Ophthalmology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China.
² State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.
³ School of Medicine, South China University of Technology, Guangzhou, China.

Abstract

Background: To investigate retinal neurovascular structural changes in patients with ischemic stroke (IS) using optical coherence tomography angiography (OCTA).

Materials and methods: The cross-sectional study was conducted in Guangdong Provincial People's Hospital, China, consisting of 159 eyes from IS patients and 109 eyes from age-matched control subjects. Retinal microvascular parameters including the vessel density (VD) of the superficial capillary plexus (SCP), deep capillary plexus (DCP) and radial peripapillary capillary (RPC), and neural parameters such as ganglion cell complex thickness (GCCt) and retinal nerve fibre layer thickness (RNFLt) were measured by OCTA.

Results: The VD of SCP and DCP in the macular area were significantly reduced in IS patients compared to the control group (all p < 0.001). The VD of RPC at the optic disc was also significantly reduced in IS patients (all p < 0.05). IS patients showed reduced GCCt and RNFLt and increased GCC focal loss volume and global loss volume compared with the controls (all p < 0.05). Among patients with IS, the parafovea SCP VD was positively correlated with GCCt (r = 0.346-0.408, all p < 0.001) but not with DCP VD (all p > 0.1). In the optic disc region, the whole image RPC VD was positively correlated with mean RNFLt (r = 0.467-0.548, all p < 0.001).

Conclusion: Reduction of retinal VD, GCCt and RNFLt was observed in patients with IS. The parafovea SCP VD and RPC VD were positively correlated with GCCt and RNFLt, respectively.

Keywords: ganglion cell complex; ischemic stroke; neurovascular; optical coherence tomography angiography (OCTA); retinal nerve fibre layer; retinal vessel density.