Assessment of cerebral low-frequency oscillations in patients with retinal vein occlusion: a preliminary functional MRI study

Background There is increasing evidence that patients with retinal vein occlusion exhibit cerebral vascular changes and are at an increased risk of stroke. However, it remains unknown whether patients with retinal vein occlusion exhibit changes in intrinsic brain activity. Purpose This study investi...

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Veröffentlicht in:Acta radiologica (1987) 2020-06, Vol.61 (6), p.813-820
Hauptverfasser: Gao, Qing, Peng, Bin, Huang, Xin, Qi, Chen-Xing, Tong, Yan, Deng, Qin-Qin, Shen, Yin
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Sprache:eng
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Zusammenfassung:Background There is increasing evidence that patients with retinal vein occlusion exhibit cerebral vascular changes and are at an increased risk of stroke. However, it remains unknown whether patients with retinal vein occlusion exhibit changes in intrinsic brain activity. Purpose This study investigated intrinsic brain activity changes in patients with retinal vein occlusion by assessing the amplitude of low-frequency fluctuations. Material and Methods Forty-five patients with retinal vein occlusion (22 men, 23 women, mean age 56.55 ± 6.97 years) and 43 healthy controls (13 men, 30 women; mean age 53.53 ± 8.19 years) closely matched in age, sex, and education level underwent resting-state MRI scans. The amplitude of low-frequency fluctuation method was used to compare intrinsic brain activity between the two groups. Results Compared with healthy controls, patients with retinal vein occlusion exhibited significantly lower amplitude of low-frequency fluctuation values in the left middle occipital gyrus, right middle occipital gyrus, and right calcarine. However, patients with retinal vein occlusion showed significantly higher amplitude of low-frequency fluctuations in the bilateral cerebellum 6, right hippocampus, left insula, and left fusiform (voxel-level P 
ISSN:0284-1851
1600-0455
DOI:10.1177/0284185119879683