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Agreement of duplex ultrasonography vs. computed tomography angiography for evaluation of native and in-stent SFA re-stenosis—Findings from a randomized controlled trial
- Source :
- European Journal of Radiology. 81:2265-2269
- Publication Year :
- 2012
- Publisher :
- Elsevier BV, 2012.
-
Abstract
- Multidetector CT angiography (CTA) is a non-invasive imaging technique for evaluation of peripheral vascular disease. CTA might be particularly useful for assessment of intermediate- and long-term morphological outcome after endovascular treatment. Validation of CTA vs. the current imaging standard, colour Doppler ultrasonography (CDUS), for quantification of native and in-stent re-stenosis in the superficial femoral artery (SFA) is required.Seventy randomized patients who underwent stent implantation (n=47) or balloon angioplasty (n=23) underwent 6-month follow-up with CDUS and CTA. CTA was compared with CDUS in both sub-groups of patients in terms of binary re-stenosis (50% lumen narrowing) and re-occlusion. Agreement between CTA and CDUS was assessed using Kappa (κ) statistics with 95% confidence intervals, and correlation coefficients.Binary re-stenosis was detected in 16/70 (22.9%) patients by CTA and 17/70 (24.3%) patients by CDUS (κ=0.88, 95% CI: 0.80-0.96). Re-stenosis rates after balloon angioplasty were 39.1% (9/23) on CTA and CDUS (κ=0.82, 95% CI: 0.66-0.98), and after stent implantation 14.9% (7/47) on CTA and 17.0% (8/47) on CDUS (κ=0.92, 95% CI: 0.84-1.00). Re-occlusions were detected in 3/70 (4.3%) patients by both CTA and CDUS (κ=0.65; 95% CI 0.54-0.76). Significant correlations (r=0.85, p0.001) were noted between degree of re-stenosis on CTA and peak velocity ratio on CDUS. The correlation coefficient was higher in patients after balloon angioplasty (r=0.94, p0.001) than in patients after stent implantation (r=0.71, p0.001).CTA and CDUS show excellent agreement for evaluation of native and in-stent re-stenosis after endovascular treatment of SFA obstructions. CTA is an appropriate non-invasive imaging modality for follow-up after endovascular therapy.
- Subjects :
- Male
medicine.medical_specialty
Duplex ultrasonography
medicine.medical_treatment
Lumen (anatomy)
Balloon
Sensitivity and Specificity
Angioplasty
Humans
Medicine
Radiology, Nuclear Medicine and imaging
cardiovascular diseases
Aged
Ultrasonography
Computed tomography angiography
medicine.diagnostic_test
business.industry
Vascular disease
musculoskeletal, neural, and ocular physiology
Angiography
Graft Occlusion, Vascular
Reproducibility of Results
Stent
General Medicine
Middle Aged
medicine.disease
Femoral Artery
Female
Stents
Radiology
Tomography, X-Ray Computed
business
psychological phenomena and processes
Subjects
Details
- ISSN :
- 0720048X
- Volume :
- 81
- Database :
- OpenAIRE
- Journal :
- European Journal of Radiology
- Accession number :
- edsair.doi.dedup.....ba7a0a537c7e2402ac70002efc6987a6