Comparison of carotid artery dimensions and lesion length measured by B-mode ultrasonography and quantitative angiography in patients with severe stenosis undergoing percutaneous revascularization.
BACKGROUND
To evaluate the correlation and agreement of the carotid artery landmarks necessary for carotid artery stenting obtained by B-mode ultrasonography (BMU), and by quantitative angiography (QCA) in patients with severe carotid artery stenosis.


METHODS
In 75 patients undergoing carotid artery stenting, the distal common (CCA), proximal internal (ICA) carotid artery diameter, and lesion length were measured preoperatively by BMU, and intraoperatively by QCA.


RESULTS
In 96% of the subjects, BMU imaging was adequate for interpretation. BMU and QCA Pearson correlation and Lin concordance coefficients were 0.75 (p < 0.001) and 0.959 (95% CI: 0.930 - 0.996), respectively, for CCA diameter, 0.88 (p < 0.001) and 0.954 (95% CI: 0.928-0.983), respectively, for ICA diameter, and 0.62 (p < 0.001) and 0.734 (95% CI: 0.719-0.760), respectively, for lesion length, with a 0.765 bias correction factor and a wider data scatter by Bland Altman plots showing shorter lesion length by BMU than by QCA.


CONCLUSIONS
In patients with carotid artery stenosis, BMU can provide reliable distal CCA and proximal ICA diameters in comparison with QCA, whereas lesion length measured by BMU has an acceptable correlation, but a poor agreement with QCA.
Scott and White Memorial Hospital and Clinic, Department of Surgery, Temple, TX.
Laura
L
Harmon
Fernando
F
Boccalandro
D000368:Aged; D015901:Angiography, Digital Subtraction / Q000379:methods*; D001837:Body Weights and Measures / Q000379:methods*; D002339:Carotid Arteries / Q000000981:diagnostic imaging* / Q000503:physiopathology; D017536:Carotid Artery, Common / Q000000981:diagnostic imaging / Q000503:physiopathology; D002343:Carotid Artery, Internal / Q000000981:diagnostic imaging / Q000503:physiopathology; D016893:Carotid Stenosis / Q000000981:diagnostic imaging* / Q000503:physiopathology; D017023:Coronary Angiography / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D062645:Percutaneous Coronary Intervention; D011237:Predictive Value of Tests; D012372:ROC Curve; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D018616:Ultrasonography, Doppler, Duplex / Q000379:methods*
B-mode ultrasonography; carotid artery; carotid stenting; quantitative angiography