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. 2019 Jan 29;10:26. doi: 10.3389/fneur.2019.00026

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Copyright © 2019 Li, Hua, Yang and Li.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The results of CDFI during the second hospitalization. (A) Two-dimensional gray-scale imageing showed a long hyperechoic segment on the right side of neck: styloid process (arrows); (B) CDFI showed the right ICA was oppressed by the styloid process (arrow); (C) The blood flow velocity in right ICA in normal position: PSV = 72 cm/s, EDV = 33 cm/s; (D) The blood flow velocity in right ICA increased when the patient slowly turned head to the right: PSV = 204 cm/s, EDV = 113 cm/s. PSV, peak systolic velocity; EDV, end diastolic velocity.