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Published in: The International Journal of Cardiovascular Imaging 10/2023

Open Access 21-08-2023 | Intravascular Ultrasound | Original Paper

Imaging modality-dependent carotid stenosis severity variations against intravascular ultrasound as a reference: Carotid Artery intravasculaR Ultrasound Study (CARUS)

Authors: Lukasz Tekieli, Anna Kablak-Ziembicka, Wladyslaw Dabrowski, Karolina Dzierwa, Zbigniew Moczulski, Malgorzata Urbanczyk-Zawadzka, Adam Mazurek, Justyna Stefaniak, Piotr Paluszek, Maciej Krupinski, Tadeusz Przewlocki, Piotr Pieniazek, Piotr Musialek

Published in: The International Journal of Cardiovascular Imaging | Issue 10/2023

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Abstract

Purpose

Different non-invasive and invasive imaging modalities are used to determine carotid artery stenosis severity that remains a principal parameter in clinical decision-making. We compared stenosis degree obtained with different modalities against vascular imaging gold standard, intravascular ultrasound, IVUS.

Methods

300 consecutive patients (age 47–83 years, 192 men, 64% asymptomatic) with carotid artery stenosis of “ ≥ 50%” referred for potential revascularization received as per study protocol (i) duplex ultrasound (DUS), (ii) computed tomography angiography (CTA), (iii) intraarterial quantitative angiography (iQA) and (iv) and (iv) IVUS. Correlation of measurements with IVUS (r), proportion of those concordant (within 10%) and proportion of under/overestimated were calculated along with recipient-operating-characteristics (ROC).

Results

For IVUS area stenosis (AS) and IVUS minimal lumen area (MLA), there was only a moderate correlation with DUS velocities (peak-systolic, PSV; end-diastolic, EDV; r values of 0.42–0.51, p < 0.001 for all). CTA systematically underestimated both reference area and MLA (80.4% and 92.3% cases) but CTA error was lesser for AS (proportion concordant-57.4%; CTA under/overestimation-12.5%/30.1%). iQA diameter stenosis (DS) was found concordant with IVUS in 41.1% measurements (iQA under/overestimation 7.9%/51.0%). By univariate model, PSV (ROC area-under-the-curve, AUC, 0.77, cutoff 2.6 m/s), EDV (AUC 0.72, cutoff 0.71 m/s) and CTA-DS (AUC 0.83, cutoff 59.6%) were predictors of ≥ 50% DS by IVUS (p < 0.001 for all). Best predictor, however, of ≥ 50% DS by IVUS was stenosis severity evaluation by automated contrast column density measurement on iQA (AUC 0.87, cutoff 68%, p < 0.001). Regarding non-invasive techniques, CTA was the only independent diagnostic modality against IVUS on multivariate model (p = 0.008).

Conclusion

IVUS validation shows significant imaging modality-dependent variations in carotid stenosis severity determination.
Appendix
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Metadata
Title
Imaging modality-dependent carotid stenosis severity variations against intravascular ultrasound as a reference: Carotid Artery intravasculaR Ultrasound Study (CARUS)
Authors
Lukasz Tekieli
Anna Kablak-Ziembicka
Wladyslaw Dabrowski
Karolina Dzierwa
Zbigniew Moczulski
Malgorzata Urbanczyk-Zawadzka
Adam Mazurek
Justyna Stefaniak
Piotr Paluszek
Maciej Krupinski
Tadeusz Przewlocki
Piotr Pieniazek
Piotr Musialek
Publication date
21-08-2023
Publisher
Springer Netherlands
Published in
The International Journal of Cardiovascular Imaging / Issue 10/2023
Print ISSN: 1569-5794
Electronic ISSN: 1875-8312
DOI
https://doi.org/10.1007/s10554-023-02875-1

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