Marlon I Spreen1, Jasper M Martens1, Bettina E Hansen1, Bob Knippenberg1, Elke Verhey1, Lukas C van Dijk1, Jean-Paul P M de Vries1, Jan-Albert Vos1, Gert Jan de Borst1, Evert-Jan P A Vonken1, Jan J Wever1, Randolph G Statius van Eps1, Willem P Th M Mali1, Hans van Overhagen2. 1. From the Departments of Radiology (M.I.S., J.M.M., L.C.v.D., H.v.O.) and Vascular Surgery (B.K., J.J.W., R.G.S.v.E.), Haga Teaching Hospital, The Hague, The Netherlands; Department of Gastroenterology and Hepatology, Erasmus University Medical Center, Rotterdam, The Netherlands (B.E.H., E.V.); Departments of Vascular Surgery (J.-P.P.M.d.V.) and Radiology (J.-A.V.), Sint Antonius Hospital, Nieuwegein, The Netherlands; and Departments of Vascular Surgery (G.J.d.B.) and Radiology (E.-J.P.A.V., W.P.T.M.M.), University Medical Center Utrecht, Utrecht, The Netherlands. 2. From the Departments of Radiology (M.I.S., J.M.M., L.C.v.D., H.v.O.) and Vascular Surgery (B.K., J.J.W., R.G.S.v.E.), Haga Teaching Hospital, The Hague, The Netherlands; Department of Gastroenterology and Hepatology, Erasmus University Medical Center, Rotterdam, The Netherlands (B.E.H., E.V.); Departments of Vascular Surgery (J.-P.P.M.d.V.) and Radiology (J.-A.V.), Sint Antonius Hospital, Nieuwegein, The Netherlands; and Departments of Vascular Surgery (G.J.d.B.) and Radiology (E.-J.P.A.V., W.P.T.M.M.), University Medical Center Utrecht, Utrecht, The Netherlands. h.voverhagen@hagaziekenhuis.nl.
Abstract
BACKGROUND: Endovascular infrapopliteal treatment of patients with critical limb ischemia using percutaneous transluminal angioplasty (PTA) and bail-out bare metal stenting (BMS) is hampered by restenosis. In interventional cardiology, drug-eluting stents (DES) have shown better patency rates and are standard practice nowadays. An investigator-initiated, multicenter, randomized trial was conducted to assess whether DES also improve patency and clinical outcome of infrapopliteal lesions. METHODS AND RESULTS:Adults with critical limb ischemia (Rutherford category ≥4) and infrapopliteal lesions were randomized to receive PTA±BMS or DES with paclitaxel. Primary end point was 6-month primary binary patency of treated lesions, defined as ≤50% stenosis on computed tomographic angiography. Stenosis >50%, retreatment, major amputation, and critical limb ischemia-related death were regarded as treatment failure. Severity of failure was assessed with an ordinal score, ranging from vessel stenosis through occlusion to the clinical failures. Seventy-four limbs (73 patients) were treated with DES and 66 limbs (64 patients) receivedPTA±BMS. Six-month patency rates were 48.0% for DES and 35.1% for PTA±BMS (P=0.096) in the modified-intention-to-treat and 51.9% and 35.1% (P=0.037) in the per-protocol analysis. The ordinal score showed significantly worse treatment failure for PTA±BMS versus DES (P=0.041). The observed major amputation rate remained lower in the DES group until 2 years post-treatment, with a trend toward significance (P=0.066). Less minor amputations occurred after DES until 6 months post-treatment (P=0.03). CONCLUSIONS: In patients with critical limb ischemia caused by infrapopliteal lesions, DES provide better 6-month patency rates and less amputations after 6 and 12 months compared with PTA±BMS. CLINICAL TRIAL REGISTRATION: URL: http://www.clinicaltrials.gov. Unique identifier: NCT00471289.
RCT Entities:
BACKGROUND: Endovascular infrapopliteal treatment of patients with critical limb ischemia using percutaneous transluminal angioplasty (PTA) and bail-out bare metal stenting (BMS) is hampered by restenosis. In interventional cardiology, drug-eluting stents (DES) have shown better patency rates and are standard practice nowadays. An investigator-initiated, multicenter, randomized trial was conducted to assess whether DES also improve patency and clinical outcome of infrapopliteal lesions. METHODS AND RESULTS: Adults with critical limb ischemia (Rutherford category ≥4) and infrapopliteal lesions were randomized to receive PTA±BMS or DES with paclitaxel. Primary end point was 6-month primary binary patency of treated lesions, defined as ≤50% stenosis on computed tomographic angiography. Stenosis >50%, retreatment, major amputation, and critical limb ischemia-related death were regarded as treatment failure. Severity of failure was assessed with an ordinal score, ranging from vessel stenosis through occlusion to the clinical failures. Seventy-four limbs (73 patients) were treated with DES and 66 limbs (64 patients) received PTA±BMS. Six-month patency rates were 48.0% for DES and 35.1% for PTA±BMS (P=0.096) in the modified-intention-to-treat and 51.9% and 35.1% (P=0.037) in the per-protocol analysis. The ordinal score showed significantly worse treatment failure for PTA±BMS versus DES (P=0.041). The observed major amputation rate remained lower in the DES group until 2 years post-treatment, with a trend toward significance (P=0.066). Less minor amputations occurred after DES until 6 months post-treatment (P=0.03). CONCLUSIONS: In patients with critical limb ischemia caused by infrapopliteal lesions, DES provide better 6-month patency rates and less amputations after 6 and 12 months compared with PTA±BMS. CLINICAL TRIAL REGISTRATION: URL: http://www.clinicaltrials.gov. Unique identifier: NCT00471289.
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