A randomized comparison of clopidogrel and aspirin versus ticlopidine and aspirin after the placement of coronary artery stents.

Abstract

The aim of the present study was to compare clopidogrel and ticlopidine after coronary stenting with regard to cardiovascular death during long-term follow-up. Randomized trials comparing clopidogrel and ticlopidine with a restricted use of intravenous glycoprotein IIb/IIIa inhibition have reported a trend toward a higher incidence of thrombotic stent occlusion with clopidogrel at 30 days. After successful coronary stent implantation, 700 patients with 899 lesions were randomly assigned to receive a four-week course of either 500 mg ticlopidine (n = 345) or 75 mg clopidogrel (n = 355) in addition to 100 mg aspirin. Cardiovascular death was the primary end point and was recorded during a median follow-up period of 28 months. Cardiovascular death occurred in eight patients with ticlopidine versus 26 patients with clopidogrel (hazard ratio with ticlopidine compared with clopidogrel, 0.30; 95% confidence interval [CI], 0.14 to 0.66; p = 0.003). After adjustment for co-variables, ticlopidine reduced the risk of cardiovascular death by 63% compared with clopidogrel. The combined end point of cardiovascular death or nonfatal myocardial infarction was present in 19 patients assigned ticlopidine, compared with 40 patients assigned clopidogrel (hazard ratio, 0.45; p = 0.005). The hazard ratio for all-cause mortality with ticlopidine as compared with clopidogrel was 0.30 (95% CI, 0.14 to 0.64; p = 0.002). After the placement of coronary artery stents in unselected patients, ticlopidine was associated with a significantly lower mortality than clopidogrel. This raises concern about the current practice of substituting clopidogrel for ticlopidine after stenting and highlights the need for further long-term studies.