Abstract
Purpose
This study aimed to investigate fundus and optical coherence tomography angiography (angio-OCT) manifestations in carotid cavernous fistula (CCF) patients.
Methods
Nine eyes of 7 CCF patients diagnosed with digital subtraction angiography (DSA) were included in this study. Best-corrected visual acuity (BCVA), intraocular pressure (IOP), slit lamp, fundus, spectral-domain optical coherence tomography (SD-OCT), and optical coherence tomography angiography (angio-OCT) examination in the CCF patients and 10 normal controls were conducted. Subfoveal choroidal thickness (SFCT) and macular vascular density (VD) were measured and compared with the control group. SFCT and VD were also compared before and after embolization therapy.
Results
Two male and 5 female CCF patients were included. The average age was 59.7 ±10.0 (years). Embolization therapy was conducted in 3 patients. Fundus manifestations included disc oedema and exudation, retinal venular dilation, and retinal haemorrhage. B-scan OCT examination revealed retinal and choroidal undulations, retinal-choroidal thickness, retinal cystoid oedema, and subretinal fluid. The SFCT of the affected eyes was thicker than that of the control group (412.3 ± 123.7 μm vs. 272.9 ± 62.9 μm; P = 0.006). Macular superficial capillary plexus (SCP) VD in affected eyes was lower than that in the control eyes (50.1 ±2.3 % vs. 52.7 ± 1.7 % ; P = 0.014). The SFCT was reduced, and the vessel density in the SCP was increased after embolization therapy.
Conclusion
We demonstrated decreased VD in CCF patients with specific fundus and OCT manifestations. The pathological changes were immediately reduced after embolization therapy. This preliminary observation provides a supplemental method for the diagnosis and pathophysiological examination of CCF patients.
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Data availability
Datasets used or analyzed in the current study are available from the corresponding author upon reasonable request.
Code availability
Not applicable
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XW designed this study, summarized the data, and drafted this manuscript. Jin Ma and Yong Zhong revised the manuscript in detail. XZ conducted the intervention therapy operations. YW assisted with the acquisition of the data. LG helped with the statistical analysis. All authors read and approved the final manuscript.
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Our study was conducted according to the tenets of the Declaration of Helsinki. This study was approved by the institutional review board of the Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences. Formal consent was not required for this study.
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Wang, X., Zhang, X., Gan, L. et al. Observation of fundus and optical coherence tomography angiography manifestations in carotid cavernous fistula patients. Graefes Arch Clin Exp Ophthalmol 259, 2573–2582 (2021). https://doi.org/10.1007/s00417-021-05117-z
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DOI: https://doi.org/10.1007/s00417-021-05117-z