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Infrapopliteal Stenting 2006
The „Leipzig Experience“ &
a Global Review of DES & BMS
  • Andrej Schmidt, MD and
  • Dierk Scheinert, MD


  • Department of Medicine I / Angiology
  • Park Hospital Leipzig, Germany
  • Division of Angiology
  • University of Leipzig – Heart Center
  • Germany
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Balloon-Angioplasty of Infrapopliteal Arteries in Critical Limb Ischemia
  • 60 pat., 72 limbs, 12-24 Mo F/U
  • Lesion-length  3.8 ± 3.0 cm
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PTA in Critical Limb Ischemia
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Infrapopliteal Lesions in
Claudicants
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Stents for Revascularisation of Infrapopliteal Arteries
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Stents for Revascularisation of Infrapopliteal Arteries
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PTA + Stenting of Infrapop. Lesions
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Diffuse Lesions in Diabetes-Patients
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"Passive coatings"
  • Passive coatings
  • Active coatings
  • Bioabsorbable stents
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"Patients and lesions:"
  • Patients and lesions:


    • Patients with CLI (Rutherford 4,5)
    • Single or multiple highgrade stenoses (>70%)
    • Or occlusions
    • Max: 3 lesions, 3cm
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"Multicentric,"
  • Multicentric, prospective, randomized
  • 6 European centers


  • 100 patients (50 PTA, 50 Carbostent (Sorin))
  • Rutherford 4 and 5
  • Target lesion <45mm, max. 3 lesions


  • Primary endpoint:
  •   Angiographic late lumen loss at 9 months
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"BEST-BTK"
  • BEST-BTK
  • First in Man experience with the
    Biotronik absorbablE metal StenT
    Below The Knee


  • Dual center, prospective, non randomized analysis of the safety & performance of
    the Lekton Mg (Biotronik) AMS
    in endovascular infrapopliteal procedures
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Drug-Eluting Stents Below the Knee
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FK506-Eluting Stents Below the Knee
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Ceramic – Coating (ALO)
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Tacrolimus (FK506)
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Inhibition of SMC and EC
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FK506 + Ceramic-Coating:  Case 1
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FK506 + Ceramic-Coating:  Case 1
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FK506 + Ceramic-Coating:  Case 2
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FK506 + Ceramic-Coating:  Case 2
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FK506-Eluting Stents; Results
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Active Coatings
  • Sirolimus-eluting balloon-expandable stent – CYPHER selectTM (Cordis)


  • Two phases:
    • Proof of concept: Comparative pilot study
    • Mid-term efficacy: Cypher registry


    • Cypher is CE-marked for BTK-indication
    • Cypher is not approved in the US for BTK
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"Symptomatic PAOD Rutherford 3 to..."
  • Symptomatic PAOD Rutherford 3 to 5
  • Single infrapopliteal lesions
  • Lesion length up to 30 mm
  • Reference vessel diameter 3.0 to 3.5 mm
  • Max. 1 stent / patient
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"30 patients:"
  • 30 patients: Sirolimus-eluting stent
  • Cypher select (Cordis)


  • 30 patients: Bare-metal stent
  • Sonic (Cordis)


  • (3,5/33 mm-stents)
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Follow-up Example -  Cypher Stent
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SES (Cypher) vs. BMS – Pilot Study
Summary
  • According to the angiographic follow-up the use of sirolimus-eluting stents was associated with a significantly reduced in-stent-reobstruction rate (0% vs 56%).


  • Adverse clinical events (amputation and TLR) could be significantly reduced using sirolimus-eluting stents.
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SES (Cypher) vs. BMS
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 Cypher – BTK Registry
Study Objective
  • To assess the mid-term safety and efficacy of Sirolimus-eluting balloon-expandable stents for symptomatic focal infrapopliteal obstructions.
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 Cypher – BTK Registry
Study Design
  • Prospective, non-randomized, monocentric registry


  • Investigator initiated, no industry support


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 Cypher – BTK Registry
Study Endpoints
  • Clinical and Safety Endpoints
    • Death
    • Major amputation (above the metatarsal level)
    • Target lesion revascularization (TLR)
    • Bypass surgery
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 Cypher – BTK Registry
Baseline Angiographic Data
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 Cypher – BTK Registry
Study Design
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 Cypher – BTK Registry
Study Design
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 Cypher – BTK Registry
Angiographic Follow-up
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"Patient with moderate claudiaction refused..."
  • Patient with moderate claudiaction refused re-intervention


  • 1 months later acute ischemia with occlusion of the popliteal artery and the Cypher stent


  • Successfully treated with thrombolysis and SFA-stenting
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 Cypher – BTK Registry
Angiographic Follow-up
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Conclusions
  • Sirolimus-eluting stents are safe and effective for treatment of focal infrapopliteal obstructions.


  • These results need to be validated in a randomized, multicentric trial.