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Drug-eluting stents versus bare-metal stents in acute myocardial infarction: A systematic review and meta-analysis

Published online by Cambridge University Press:  25 January 2011

Hae Sun Suh
Affiliation:
National Evidence-based Healthcare Collaborating Agency
Hyun Jin Song
Affiliation:
National Evidence-based Healthcare Collaborating Agency
Ji Eun Choi
Affiliation:
National Evidence-based Healthcare Collaborating Agency
Eun Jin Jang
Affiliation:
National Evidence-based Healthcare Collaborating Agency
Hee Jeong Son
Affiliation:
National Evidence-based Healthcare Collaborating Agency
Sang Moo Lee
Affiliation:
National Evidence-based Healthcare Collaborating Agency
Jung-Sun Kim
Affiliation:
Severance Cardiovascular Hospital, Yonsei University College of Medicine
Donghoon Choi
Affiliation:
National Evidence-based Healthcare Collaborating Agency Severance Cardiovascular Hospital, Yonsei University College of Medicine

Abstract

Objectives: Recent concerns have been raised for the safety after drug-eluting stents (DES) implantation compared with the use of bare-metal stents (BMS) in patients with ST-elevation acute myocardial infarction (STEMI). The objective of this study was to estimate the relative impact of DES versus BMS on mortality, myocardial infarction (MI), target vessel revascularization (TVR), and stent thrombosis (ST) in STEMI patients by performing comprehensive meta-analyses of randomized controlled trials (RCTs) and observational studies.

Methods: We performed an electronic search and manual search of studies presented through September 2009, without language restrictions. An approach of “using systematic reviews” was used. Two independent reviewers extracted prespecified data from each study. A random-effects model was used to combine trials and to perform stratified analyses based on study designs and the duration of follow-up.

Results: Fourteen RCTs were identified (N = 7,654). Compared with BMS, DES significantly reduced TVR (risk ratio [RR], 0.48; 95 percent confidence interval [CI], 0.41–0.56) and MI (RR, 0.77; 95 percent CI, 0.61–0.97), without increasing mortality (RR, 0.88; 95 percent CI, 0.70–1.10) and ST (RR, 0.93; 95 percent CI, 0.72–1.21). Among 35 observational studies (N = 44,849), the use of DES was associated with a significant reduction in mortality (RR, 0.85; 95 percent CI, 0.79–0.91) and TVR (RR, 0.61; 95 percent CI, 0.48–0.77). MI and ST were significantly lower in the DES group within 1-year follow-up, but there were no differences within 2 years of follow-up. There was no evidence of statistical heterogeneity and publication bias.

Conclusions: These data in aggregate suggest that using DES in STEMI patients is safe and efficacious, but there are differences between RCT and observational data comparing DES and BMS.

Type
ASSESSMENTS
Copyright
Copyright © Cambridge University Press 2011

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