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Abstract #3288

Hemodynamic variations and the direction of ophthalmic artery flow in patients with internal carotid artery stenosis before and after stenting: A DSC MRI study

Pei-Shan Ho 1 , Ting-Yu Chang 2 , Kuo-Lun Huang 2 , Feng-Xian Yan 1,3 , Ho-Fai Wong 4 , Tsong-Hai Lee 2 , and Ho-Ling Liu 1,4

1 Medical Imaging and Radiological Sciences, Chang Gung University, Taoyuan, Taiwan, 2 Neurology and Stroke Center, Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Taoyuan, Taiwan, 3 Radiology, Taipei Medical University - Shuang Ho Hospital, New Taipei City, Taiwan, 4 Medical Imaging and Intervention, Chang Gung Memorial Hospital, Taoyuan, Taiwan

Severe internal carotid artery (ICA) stenosis often accompanies reversed ophthalmic artery (OA) flow; however, the quantified comparison between OA flow forward and reversed was not documented. This study compared the indicative parameter maps of dynamic susceptibility contrast (DSC) MRI between subjects suffering from unilateral ICA stenosis with and without OA flow reversed. 51 unilateral ICA stenosis patients underwent DSC MRI before and after stenting. Contrary to patients with OA flow forward, patients with OA flow reversed have increased mean transit time as well as arrival time delay before stent surgery. Moreover, the effectively recovery was detectable after carotid stent replacement.

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