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Wall shear stress distribution at the carotid bifurcation: influence of eversion carotid endarterectomy.

Abstract：

OBJECTIVES:To test the feasibility of four-dimensional (4D) flow MRI to quantify the systolic wall shear stress (WSSsystole) and oscillatory shear index (OSI) in high-grade internal carotid artery (ICA) stenosis before and after endarterectomy (CEA). METHODS:Twenty patients with ≥60 % ICA stenosis were prospectively and consequently included. Four-dimensional flow MRI was used to measure individual time-resolved 3D blood flow velocities. Segmental WSSsystole and OSI were derived at eight wall segments in analysis planes positioned along the ICA, common (CCA) and external carotid artery (ECA). RESULTS:Regional WSSsystole of all patients decreased after CEA (P < 0.05). Changes were most prominent at the ICA bulb but remained unchanged in the CCA and ECA. OSI was significantly lower after CEA in the lateral vessel walls (P < 0.05). For analysis planes at the stenosis in- and outlet, a reduction of mean WSSsystole by 32 % and 52 % (P < 0.001) and OSI distal to the stenosis (40 %, P = 0.01) was found after CEA. CONCLUSIONS:Our findings show the potential of in vivo 4D flow MRI to quantify haemodynamic changes in wall shear stress even in patients with complex flow conditions.

journal_name

Eur Radiol

journal_title

European radiology

authors

Harloff A,Berg S,Barker AJ,Schöllhorn J,Schumacher M,Weiller C,Markl M

doi

10.1007/s00330-013-2953-4

subject

Has Abstract

pub_date

2013-12-01 00:00:00

pages

3361-9

issue

12

eissn

0938-7994

issn

1432-1084

journal_volume

23

pub_type

杂志文章

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