Prehospital versus in-hospital unfractionated heparin in ST-segment elevation myocardial infarction undergoing primary percutaneous coronary intervention: a systematic review and meta-analysis.
BACKGROUND AND IMPORTANCE In patients with ST-segment elevation myocardial infarction (STEMI), myocardial loss continues until coronary reperfusion is achieved. OBJECTIVE To evaluate whether prehospital administration of unfractionated heparin (UFH) improves preprocedural infarct-related artery patency and clinical o...