What is the role of unfractionated heparin in the treatment of acute coronary syndrome (ACS)?

Updated: Sep 30, 2020
  • Author: David L Coven, MD, PhD; Chief Editor: Eric H Yang, MD  more...
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A study by Oler et al found that unfractionated heparin was associated with a 33% reduction in the risk of myocardial infarction or death in patients with unstable angina who were treated with aspirin plus heparin, compared with patients who were treated with aspirin alone. [89] The FUTURA/OASIS-8 randomized trial found that low-dose unfractionated heparin, 50 U/kg (regardless of use of glycoprotein IIb/IIIa inhibitors), compared with standard-dose unfractionated heparin, 85 U/kg (60 U/kg with Gp IIb/IIIa inhibitors), did not reduce major peri-PCI bleeding and vascular access-site complications. [90]

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