EXPEDITED REVIEW
Effectiveness of Drug-Eluting Stents in Patients With Bare-Metal In-Stent Restenosis
Meta-Analysis of Randomized Trials
Alban Dibra, MD*,
Adnan Kastrati, MD*,*,
Fernando Alfonso, MD ,
Melchior Seyfarth, MD*,
Maria-José Pérez-Vizcayno, MD,
Julinda Mehilli, MD* and
Albert Schömig, MD*
* Deutsches Herzzentrum and 1. Medizinische Klinik rechts der Isar, Technische Universität, Munich, Germany
Clinico San Carlos University Hospital, Madrid, Spain.
Manuscript received August 11, 2006;
revised manuscript received September 20, 2006,
accepted October 1, 2006.
* Reprint requests and correspondence: Dr. Adnan Kastrati, Deutsches Herzzentrum, Lazarettstr. 36, 80636 Munich, Germany (Email: kastrati{at}dhm.mhn.de).
OBJECTIVES: We sought to synthesize the available evidence on the effectiveness of drug-eluting stents for bare-metal in-stent restenosis.
BACKGROUND: Although there is clinical evidence that drug-eluting stents are associated with better results than other treatments for in-stent restenosis, they are not yet approved for this indication. Meta-analysis of randomized trials may yield more precise estimates of treatment effects and enable a rapid adoption of effective treatments in clinical practice.
METHODS: Data sources included PubMed and conference proceedings. Prespecified criteria were met by 4 randomized studies comparing sirolimus- or paclitaxel-eluting stents versus balloon angioplasty or vascular brachytherapy in 1,230 patients with bare-metal in-stent restenosis. Studies reported the clinical outcomes of efficacy and safety during a minimum of 9 months. The primary outcome was target lesion revascularization.
RESULTS: No significant heterogeneity was found across trials, thus showing a similar effect size regardless of the use of balloon angioplasty or vascular brachytherapy as comparators. The risk of target lesion revascularization (odds ratio 0.35, 95% confidence interval [CI] 0.25 to 0.49; p < 0.001) and that of angiographic restenosis (odds ratio 0.36, 95% CI 0.27 to 0.49; p = 0.001) were markedly lower in patients treated with drug-eluting stents. There were no differences between patients treated with drug-eluting stents and those treated with other techniques with respect to the composite of death or myocardial infarction (odds ratio 1.04, 95% CI 0.54 to 2.03; p = 0.55).
CONCLUSIONS: Drug-eluting stents are markedly superior to conventional techniques (balloon angioplasty and vascular brachytherapy) and should be considered as first-line treatment for patients with bare-metal in-stent restenosis.
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Abbreviations and Acronyms
| | BA = balloon angioplasty | | BMS = bare-metal stent(s) | | DES = drug-eluting stent(s) | | PES = paclitaxel-eluting stent(s) | | SES = sirolimus-eluting stent(s) | | TLR = target lesion revascularization |
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