Efficacy and safety of enoxaparin in combination with and without GP IIb/IIIa inhibitors in unselected patients with ST segment elevation myocardial infarction treated with primary percutaneous coronary intervention

Uwe Zeymer, Anselm Gitt, Ralf Zahn, Claus Jünger, Timm Bauer, Tobias Heer, Oliver Koeth, Jochen Senges
EuroIntervention 2009, 4 (4): 524-8

AIMS: We sought to determine the efficacy of enoxaparin in unselected patients with STEMI treated with primary percutaneous coronary intervention in clinical practice.

METHODS AND RESULTS: In a retrospective analysis of the prospective MITRA-plus registry we compared the outcomes of patients with primary PCI and either enoxaparin or unfractionated heparin. A total of 2,655 patients with STEMI < 12 hours were included in this analysis, 374 (14%) were treated with enoxaparin and 2,281 (86%) with unfractionated heparin. In the univariate analysis enoxaparin reduced mortality (1.6% versus 6.0%, < 0.001), fewer non-fatal reinfarctions (1.9% versus 3.8%, p = 0.05) and no significant difference in major bleeding (5.6% versus 7.2%, p = 0.2) was observed. In the multivariable propensity score analysis enoxaparin was associated with a reduction in the combined endpoint of death and non-fatal reinfarction (odds ratio 0.42; 95% CI 0.2-0.8). This advantage was observed both in subgroups without (odds ratio 0.33 95% CI 0.1-0.8) and with GP IIb/IIIa inhibitors (odds ratio 0.44, 95% CI 0.2-1.0).

CONCLUSIONS: Our data suggest that in unselected patients with STEMI treated with primary PCI enoxaparin compared to unfractionated heparin reduces the combined endpoint of in-hospital death and reinfarction and does not increase severe bleeding complications.

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