Optimal duration of dual antiplatelet therapy after drug-eluting stent implantation: a meta-analysis of 3 randomized controlled trials

J Cardiovasc Pharmacol. 2014 Jul;64(1):41-6. doi: 10.1097/FJC.0000000000000088.


Purpose: The optimal duration of dual antiplatelet therapy (DAPT) after drug-eluting stent (DES) implantation is still unclear. We conducted a meta-analysis of randomized trials to assess the optimal duration of DAPT after DES implantation.

Methods: Articles were identified through a literature search of EMBASE, Pubmed, Europubmed, and the Cochrane Library until November 2013. Data were independently extracted by 2 reviewers. A random effect model was used to calculate the pooled odds ratios (ORs) with 95% confidence intervals (CIs) of the clinical outcomes concerned.

Results: Three randomized controlled trials with zotarolimus- or everolimus-eluting stents and 6679 patients were included. There were no significant differences between short-term DAPT and standard-term DAPT in the comparison of incidences of cardiac death (OR, 0.84; 95% CI, 0.53-1.35; P = 0.48), myocardial infarction (OR, 1.21; 95% CI, 0.83-1.75; P = 0.32), stent thrombosis (OR, 1.30; 95% CI, 0.50-3.39; P = 0.59), and target vessel revascularization (OR, 1.16; 95% CI, 0.89-1.52; P = 0.26). Short-term DAPT did not increase the risk of all-cause death (OR, 0.86; 95% CI, 0.59-1.26; P = 0.44), cerebrovascular accidents (OR, 0.88; 95% CI, 0.421.81; P = 0.72), and major bleeding events (OR, 0.59; 95% CI, 0.30-1.15; P = 0.12).

Conclusions: The results indicate that short-term DAPT do not increase the risk of cardiac death, myocardial infarction, stent thrombosis, target vessel revascularization, major bleeding, cerebrovascular accidents, and all-cause death at 12 months after implantation of DES compared with current standard-term DAPT. However, only 3 studies with second generation of DES are included in this meta-analysis. Further well-designed studies are still needed.

Publication types

  • Meta-Analysis

MeSH terms

  • Drug Therapy, Combination
  • Drug-Eluting Stents*
  • Everolimus
  • Humans
  • Platelet Aggregation Inhibitors / administration & dosage*
  • Platelet Aggregation Inhibitors / adverse effects
  • Platelet Aggregation Inhibitors / therapeutic use
  • Randomized Controlled Trials as Topic
  • Sirolimus / administration & dosage
  • Sirolimus / analogs & derivatives
  • Time Factors


  • Platelet Aggregation Inhibitors
  • Everolimus
  • zotarolimus
  • Sirolimus