The efficacy of sirolimus- and paclitaxel-eluting stents: a meta-analysis of randomized controlled trials.

Abstract

BACKGROUND:

Drug-eluting stents prevent in-stent restenosis after percutaneous coronary intervention, and differences between sirolimus-eluting stents (SES) and paclitaxel-eluting stents (PES) may exist in the rates of target lesion revascularization, death, myocardial infarction and stent thrombosis.

OBJECTIVE:

To compare the efficacy of SES and PES with the efficacy of bare-metal stents for de novo coronary lesions in patients with stable or unstable angina.

METHODS:

A meta-analysis of randomized trials from MEDLINE, EMBASE and other electronic databases and conference proceedings was conducted. The efficacy of SES, PES with a polymer carrier (PPOL) and PES without a polymer carrier (PNPOL) was compared using random-effects models.

RESULTS:

Ten trials comprising 5041 patients were included in the meta-analysis. There was an absolute decrease in target lesion revascularization of 17% (95% CI 14% to 20%), 9% (95% CI 6% to 11%) and 3% (95% CI 0% to 6%) with SES, PPOL and PNPOL, respectively, with significant differences between SES and PPOL and between PPOL and PNPOL (P < 0.01 for both comparisons). However, sensitivity analysis using the OR of target lesion revascularization showed no difference between SES (OR 0.18 [95% CI 0.12 to 0.26]) and PPOL (OR 0.25 [95% CI 0.16 to 0.37]) (P = 0.26). There were no differences in the incidence of death, myocardial infarction or stent thrombosis, although the small number of events limited the power of these analyses.

CONCLUSIONS:

SES show a greater absolute reduction in target lesion revascularization than do PES, likely due to differences in the bare-metal stents used for comparison in the trials. Head-to-head comparisons are needed to directly address the differential efficacy of SES and PES.

• Authors: Michelle M Kittleson, Dale M Needham, S Joseph Kim, Bipin K Ravindran, Sunil S Solomon, Eliseo Guallar
• Journal: The Canadian journal of cardiology (Can J Cardiol) Vol. 21 Issue 7 Pg. 581-7 (May 15 2005) ISSN: 0828-282X [Print] England
• PMID: 15940356 (Publication Type: Comparative Study, Journal Article, Meta-Analysis, Research Support, Non-U.S. Gov't, Review)

Chemical References

• Paclitaxel
• Sirolimus

Topics

• Age Factors
• Aged
• Angioplasty, Balloon, Coronary (instrumentation, methods)
• Coronary Angiography
• Coronary Restenosis (diagnostic imaging, epidemiology)
• Dose-Response Relationship, Drug
• Drug Delivery Systems
• Female
• Humans
• Male
• Middle Aged
• Myocardial Infarction (diagnostic imaging, mortality, therapy)
• Paclitaxel (administration & dosage)
• Prognosis
• Randomized Controlled Trials as Topic
• Severity of Illness Index
• Sex Factors
• Sirolimus (administration & dosage)
• Stents
• Survival Analysis
• Treatment Outcome