PMID: 8611322Jan 1, 1996Paper

Duplex US of the external carotid artery

Acta Radiologica
M J PäivänsaloI J Suramo

Abstract

The ratio between the systolic peak velocities of the internal and common carotid arteries (vpICA/vpCCA), vpICA and grey-scale imaging measurement are generally used to evaluate internal carotid stenosis against known flow criteria in order to differentiate non-significant from significant stenosis. The same criteria are also used for evaluating the external carotid artery (ECA). Our data on 707 normal or stenotic ECA nevertheless showed that the systolic peak velocity of the normal ECA (vpECA) and its ratio to the systolic velocity of the CCA (vpECA/vpCCA) are higher than vpICA and vpICA/vpCCA. vpECA/vpCCA is about 2 in > 0-49% ECA stenosis. Only in severe stenosis are the peak velocities almost comparable. The ratio between the peak end diastolic velocities (edvECA/edvCCA) and edvECA proved to be unreliable, as did grey-scale imaging measurement of the external carotid stenosis. In addition, ipsi-lateral internal carotid stenosis greatly affects the non-stenotic external carotid flow values, and probably has the same effect on the flow values of a stenotic external artery. Thus, external carotid flow values must be considered carefully.

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Citations

Feb 1, 1997·Seminars in Ultrasound, CT, and MR·W J Zwiebel
Apr 13, 2013·European Journal of Vascular and Endovascular Surgery : the Official Journal of the European Society for Vascular Surgery·B L ReichmannG J de Borst
Aug 21, 2013·European Journal of Vascular and Endovascular Surgery : the Official Journal of the European Society for Vascular Surgery·B L ReichmannG J de Borst
Sep 26, 2014·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Yasemin GunduzHarun Kilic
May 10, 2007·Journal of Endovascular Therapy : an Official Journal of the International Society of Endovascular Specialists·Edward Y WooRonald M Fairman
Jan 3, 2020·Animal Health Research Reviews·Chike F OguejioforD Claire Wathes
May 31, 2001·Microbiology and Molecular Biology Reviews : MMBR·N Dejucq, B Jégou

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