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Altered in-stent hemodynamics may cause erroneous upgrading of moderate carotid artery restenosis when evaluated by duplex ultrasound  Maani Hakimi, MD,

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Presentation on theme: "Altered in-stent hemodynamics may cause erroneous upgrading of moderate carotid artery restenosis when evaluated by duplex ultrasound  Maani Hakimi, MD,"— Presentation transcript:

1 Altered in-stent hemodynamics may cause erroneous upgrading of moderate carotid artery restenosis when evaluated by duplex ultrasound  Maani Hakimi, MD, Peter Knez, MD, Matthias Lippert, Nicolas Attigah, MD, Karen Nelson, Tanja Laub, Dittmar Böckler, PhD, Thomas Schmitz-Rixen, PhD, Thomas Schmandra, MD  Journal of Vascular Surgery  Volume 56, Issue 5, Pages (November 2012) DOI: /j.jvs Copyright © 2012 Society for Vascular Surgery Terms and Conditions

2 Fig 1 Compliance of human superficial femoral artery and ovine common carotid artery at different pressures. ■ = human superficial femoral artery; □ = ovine carotid artery. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2012 Society for Vascular Surgery Terms and Conditions

3 Fig 2 A, Ovine artery with snares to fix stenosis tube. B, Flow velocity measurement by duplex ultrasound (DUS), proximal to stenosis tube. C, B-mode ultrasound image of stenosis tube. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2012 Society for Vascular Surgery Terms and Conditions

4 Fig 3 Ultrasound measurement of vessel diameter with perfused lumen; A, without stenosis; B, with moderate stenosis. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2012 Society for Vascular Surgery Terms and Conditions

5 Fig 4 Influence of stenosis on peak systolic velocity (PSV) in ovine carotid artery with and without stent. D, Distal; IS, in stenosis; M, middle; P, proximal. n = 12 for without stenosis and n = 6 for moderate and n = 6 for severe stenosis. Line in box plot shows median. *P < .05; **P < .01; ***P < .001. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2012 Society for Vascular Surgery Terms and Conditions

6 Fig 5 Influence of stenosis on end-diastolic velocity (EDV) in ovine carotid artery with and without stent. D, Distal; IS, in stenosis; M, middle; P, proximal. n = 12 for without stenosis and n = 6 for moderate and n = 6 for severe stenosis. Line in box plot shows median. *P < .05; **P < .01. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2012 Society for Vascular Surgery Terms and Conditions

7 Fig 6 Mean circumferential compliance without and with stent. Stent segment from 60 mm to 100 mm, arrow shows flow direction, n = 4. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2012 Society for Vascular Surgery Terms and Conditions

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