At @ days , the primary composite endpoint of death , myocardial infarction , unplanned revascularization of the infarct related artery , stent thrombosis , stroke , or bleeding was observed in @ patients ( @ % ) randomized to prasugrel plus bivalirudin and @ patients ( @ % ) randomized to clopidogrel plus heparin -LSB- relative risk , @ ; one-sided @ % confidence interval ( CI ) @-@ @ , P = @ -RSB- .