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• W2029521855 abstract "Intravascular ultrasound (IVUS) enables technical failure detection after stenting. It is too expensive and cumbersome to be used in a clinical setting. CT-like images can be generated in the angio suite with the avaibility of C-arm CT. The goal of this study is to evaluate if C-arm CT can detect technical failure after femoro-popliteal stenting. 50 patients with symptomatic femoro-popliteal artery occlusive disease were prospectively included. All but one patient had primary or secondary stenting using nitinol self-expandable stents. Once technical success was obtained on post-procedural DSA, contrast-enhanced C-arm CT and IVUS were acquired. Doppler ultrasound examinations were performed with ankle brachial pressure index (ABI) measurements at 1 year follow-up (FU). C-arm CT examinations were reviewed by 2 independent investigators. ABI were evaluated at 0.69±0.1 and 0.97±0.2 respectively pre and post procedure. At 1 year FU, more than 50% stenoses were seen in 30.7% patients (ABI 0.90±0.2). C-arm CT imaging quality was rated as good in 70%, acceptable in 20% and poor in 10% of the cases. Blooming artifacts related to stent markers were observed at the end of the stent. After matched comparison of stented segments, in-stent minimal luminal diameters (MLD) (mm) were evaluated at 4.7±0.7 on DSA, 3.4±0.6 on IVUS and 3.1±0.9 on C-arm CT. Using IVUS as a gold standard, MLD value was overestimated on DSA by more than 36% (P=0,0001) whereas a less than 10% understimation on C-arm CT was observed (P=0,1). The mean residual stenosis (MRS) was significantly different on angiography 18.7%±7.6 as compared to IVUS 29.8%±9.02 (p<0.0001). Calculated MRS (%) by diametres and minimal surface areas (mm2) show a substantial agreement between IVUS and C-arm CT, respectivelly (29.8±9.02 vs 28.3±12.5; P=0.5) and (11.63±3.9 vs 11.03±4.1, P=0.2). Inter-technique ICC between C-arm CT and IVUS were estimated at 0.71(0.54,0.83) for lumen areas. The inter-observer ICC for C-arm CT was calculated at 0.75(0.40,0.89) and 0.77(0.43,0.90), respectively for diameter and surface. Intra-operative C-arm CT is technically feasible and present a better correlation with IVUS than DSA to detect intrastent stenosis." @default.
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• W2029521855 date "2011-03-01" @default.
• W2029521855 modified "2023-10-16" @default.
• W2029521855 title "Abstract No. 341: C-arm CT value for evaluating femoropopliteal artery revascularization" @default.
• W2029521855 doi "https://doi.org/10.1016/j.jvir.2011.01.376" @default.
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