[Non-fractionated heparin versus low molecular weight heparin in acute coronary syndromes]

This article reviews the usefulness of heparins in the management of patients with acute coronary syndromes. Low molecular weight heparins have a series of advantages over unfractionated heparins, and evidences show that they are more effective than placebo and equal to unfractionated heparin in diminishing the incidence of acute myocardial infarction or death. Evidences that the effectiveness of the low molecular weight heparins are superior is limited to enoxaparin and the most benefited group is the stratified one as high risk.