Outcomes with various drug-eluting or bare metal stents in patients with ST-segment-elevation myocardial infarction: a mixed treatment comparison analysis of trial level data from 34 068 patient-years of follow-up from randomized trials.

BACKGROUND

The efficacy and safety of drug-eluting stents (DES) in patients with ST-segment-elevation myocardial infarction (STEMI) is controversial. Consequently, DES implantation has a class IIa indication in the American College of Cardiology/American Heart Association and the European Society of Cardiology STEMI guidelines.

METHODS AND RESULTS

PUBMED, EMBASE, and CENTRAL were searched for randomized clinical trials, until March 2013, comparing any of the 5 Food and Drug Administration-approved durable stent and polymer DES (sirolimus eluting stent, paclitaxel eluting stent, everolimus-eluting stent [EES], zotarolimus-eluting stent, and zotarolimus-eluting stent resolute), against each other or bare metal stents (BMS), and enrolling ≥ 50 patients with STEMI. Efficacy (target vessel revascularization) and safety (death, myocardial infarction, and stent thrombosis) outcomes at the longest reported follow-up times were evaluated. Twenty-eight randomized clinical trials with 34 068 patient-years of follow-up on subjects with STEMI fulfilled the inclusion criteria. When compared with BMS (reference rate ratio [RR] of 1), sirolimus eluting stent (RR, 0.46; 95% credibility interval [CrI], 0.36-0.56), paclitaxel eluting stent (RR, 0.69; 95% CrI, 0.53-0.87), and EES (RR, 0.42; 95% CrI, 0.26-0.62) were associated with a statistically significant reduction in rate of target vessel revascularization, with the point estimate for zotarolimus-eluting stent resolute trending in a similar direction. There was no increase in the risk of death, myocardial infarction, or stent thrombosis with any DES compared with BMS. Moreover, EES was associated with a statistically significant reduction in the rate of stent thrombosis when compared with sirolimus eluting stent (RR, 0.38; 95% CrI, 0.21-0.74), paclitaxel eluting stent (RR, 0.39; 95% CrI, 0.21-0.73), and even BMS (RR, 0.42; 95% CrI, 0.23-0.76). There was a 74% probability that EES had the lowest rate of any stent thrombosis when compared with all other stent types (no data on zotarolimus-eluting stent resolute). There was no increase in very late stent thrombosis with EES versus BMS (RR, 0.89; 95% CrI, 0.09-8.67).

CONCLUSIONS

In patients with STEMI, DES versus BMS was associated with substantial decrease in the risk of target vessel revascularization without compromising safety. EES had the added advantage of substantial reduction in the risk of stent thrombosis when compared with first-generation DES and BMS with no increase in very late stent thrombosis.