Treatment of patients with acute myocardial infarction with drug eluting stents (DES) is effective but there remain concerns regarding the long-term safety and adverse effects on the adjacent arterial wall. The biolimus-eluting Biomatrix stent addresses the issues by incorporating modifications as a biodegradable polymer and a drug application solely to the abluminal stent surface. While clinical data about the biolimus-eluting stent show a favorable safety and efficacy profile, they require confirmation in a dedicated randomised trial in the subset of patients with STEMI. Therefore, the study is designed to compare the safety and efficacy of biolimus-eluting Biomatrix stent as compared to a bare metal stent of otherwise identical design in a prospective, multicenter, randomized, controlled superiority trial in patients with acute ST-elevation myocardial infarction.