Prehospital Administration of Unfractionated Heparin in ST-Segment Elevation Myocardial Infarction Is Associated With Improved Long-Term Survival

Objective: Administration of unfractionated heparin to STEMI patients by the ambulance service is an established practice in Scotland, but the efficacy is unknown. We studied the effects of unfractionated heparin in STEMI patients treated by primary percutaneous coronary intervention, on infarct artery patency and mortality. Methods and Results: Consecutive patients (n = 1000) admitted to Ninewells Hospital, Dundee, from 2010 to 2014 for primary...