Reperfusion therapy in acute myocardial infarction For patients with STEMI: Immediate percutaneous coronary intervention or fibrinolytics For patients with NSTEMI: Immediate percutaneous coronary intervention for unstable patients or within 24 to 48 hours for stable patients For STEMI patients, emergency PCI is the preferred treatment of ST-segment elevation myocardial infarction when available in a timely fashion (door to balloon-inflation time < 90 minutes) by an experienced operator (3).