2-year clinical and angiographic outcomes from a randomized trial of polymer-free dual drug-eluting stents versus polymer-based Cypher and Endeavor [corrected] drug-eluting stents

J Am Coll Cardiol. 2010 Jun 8;55(23):2536-43. doi: 10.1016/j.jacc.2010.03.020. Epub 2010 Apr 22.


Objectives: In the ISAR-TEST-2 (Intracoronary Stenting and Angiographic Results: Test Efficacy of Three Limus-Eluting Stents) randomized trial, a new-generation sirolimus- and probucol-eluting stent (Dual-DES) demonstrated a 12-month efficacy that was comparable to sirolimus-eluting stents (SES) (Cypher, Cordis Corp., Warren, New Jersey) and superior to zotarolimus-eluting stents (ZES) (Endeavor, Medtronic CardioVascular, Santa Rosa, California). The aim of the current study was to investigate the comparative clinical and angiographic effectiveness of SES, Dual-DES, and ZES between 1 and 2 years.

Background: Long-term polymer residue is implicated in adverse events associated with delayed vessel healing after drug-eluting stent therapy. The second-generation ZES utilizes an enhanced biocompatibility polymer system whereas a new-generation Dual-DES employs a polymer-free drug-release system.

Methods: A total of 1,007 patients undergoing coronary stenting of de novo lesions in native vessels were randomized to treatment with SES (n = 335), Dual-DES (n = 333), or ZES (n = 339). Clinical follow-up was performed to 2 years. Angiographic follow-up was scheduled at 6 to 8 months and 2 years.

Results: There were no significant differences between groups regarding death/myocardial infarction (SES: 10.2% vs. Dual-DES: 7.8% vs. ZES: 9.2%; p = 0.61) or definite stent thrombosis (SES: 0.9% vs. Dual-DES: 0.9% vs. ZES: 0.6%; p = 0.87). Two-year target lesion revascularization (TLR) was 10.7%, 7.7%, and 14.3% lesions in the SES, Dual-DES, and ZES groups, respectively (p = 0.009). Incident TLR between 1 and 2 years in the Dual-DES group (0.9%) was significantly lower than in the Cypher SES group (3.6%) (p = 0.009), but comparable to the Endeavor ZES group (0.7%) (p = 0.72). These findings mirrored those observed for binary restenosis.

Conclusions: At 2 years, there was no signal of a differential safety profile between the 3 stent platforms. Furthermore, the antirestenotic efficacy of both Dual-DES and ZES remained durable between 1 and 2 years, with Dual-DES maintaining an advantage over the entire 2-year period. (Intracoronary Stenting and Angiographic Results: Test Efficacy of Three Limus-Eluting Stents [ISAR-TEST-2]; NCT00332397).

Publication types

  • Comparative Study
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Angioplasty, Balloon, Coronary / adverse effects
  • Angioplasty, Balloon, Coronary / instrumentation*
  • Angioplasty, Balloon, Coronary / methods
  • Coronary Angiography
  • Coronary Restenosis / diagnostic imaging*
  • Coronary Restenosis / mortality
  • Coronary Restenosis / pathology
  • Coronary Stenosis / diagnostic imaging*
  • Coronary Stenosis / mortality
  • Coronary Stenosis / therapy*
  • Coronary Vessels / drug effects
  • Drug-Eluting Stents*
  • Female
  • Follow-Up Studies
  • Humans
  • Male
  • Polymers
  • Probability
  • Prospective Studies
  • Prosthesis Design
  • Prosthesis Failure
  • Risk Assessment
  • Severity of Illness Index
  • Sirolimus / pharmacology
  • Stents
  • Survival Analysis
  • Time Factors
  • Treatment Outcome


  • Polymers
  • Sirolimus

Associated data

  • ClinicalTrials.gov/NCT00332397