Clinical impact of sirolimus-eluting stent in ST-segment elevation myocardial infarction: a meta-analysis of randomized clinical trials.

OBJECTIVES

To evaluate outcome of patients undergoing sirolimus-eluting stent (SES) as compared to bare-metal stent (BMS) implantation during primary angioplasty for ST-segment elevation myocardial infarction (STEMI).

BACKGROUND

The role of SES in primary percutaneous coronary intervention setting is still debated.

METHODS

We searched Medline, EMBASE, CENTRAL, scientific session abstracts, and relevant Websites for studies in any language, from the inception of each database until October 2008. Only randomized clinical trials with a mean follow-up period >6 months and sample size >100 patients were included. Primary endpoint for efficacy was target-vessel revascularization (TVR) and primary endpoint for safety was stent thrombosis. Secondary endpoints were cardiac death and recurrent myocardial infarction (MI).

RESULTS

Six trials were included in the meta-analysis, including 2,381 patients (1,192 randomized to SES and 1,189 to BMS). Up to 12-month follow-up, TVR was significantly lower in patients treated with SES as compared to patients treated with BMS (4.53% vs. 12.53%, respectively; odds ratio [OR] 0.33; 95% confidence interval [CI] 0.24-0.46; P < 0.00001). There were no significant differences in the incidence of stent thrombosis (3.02% vs. 3.70%, OR = 0.81 [95% CI, 0.52-1.27], P = 0.81), cardiac death (2.77% vs. 3.28%, OR = 0.84 [95% CI, 0.52-1.35], P = 0.47), and recurrent MI (2.94% vs. 4.04%, OR = 0.71 [95% CI, 0.45-1.11], P = 0.13) between the two groups.

CONCLUSION

SES significantly reduces TVR rates as compared to BMS in STEMI patients up to 1 year follow-up. Further studies with larger population and longer follow-up time are needed to confirm our findings.