[The use of low molecular weight heparins in patients with acute ST-elevated myocardial infarction].
INTRODUCTION According to the published guidelines for the management of acute coronary syndromes (ACS), treatment of acute ST-elevated myocardial infarction is based on rapid revascularization, either mechanical or pharmacological. Pharmacological revascularization consists of fibrinolytic therapy with antiplatelet and anticoagulant therapy. In regard to the anticoagulant therapy, low molecular weight heparins (LMWHs) are of special importance. LMWHs cause less complications (bleeding, thrombocytopenia, better bioviability) in comparison with unfractionated heparin (UFH). Some studies on use of LMWHs in ACS, show that LMWHs are equally efficient and safe as UFH, causing less complications (different types of hemorrhagic complications) (ESSENCE, TIMI 11B (enoxaparin), FRAXIS-fraxiparin), whereas some studies show better efficacy and safety of enoxaparin in therapy of acute ST-elevated myocardial infarction (ASSENT 3, ASSENT 3 PLUS, HART II, AMI-SK).


METHODS



METHODS
acute anterior myocardial infarction with ST-elevation, first myocardial infarction, no other structural heart defects, no signs of cardiogenic shock. Our study included 30 patients receiving fibrinolytic therapy with streptokinase, antiplatelet therapy and LMWH during 6 days, and 30 patients receiving UFH instead of LMWH. The follow-up period lasted for 6 months.


RESULTS
Significantly more patients receiving unfractionated heparin presented with major adverse cardiac events (73.3%) in regard to patients in the study group (44.2% nadroparin, 39.8% enoxaparin) (p = 0.025). In the group receiving UFH, 6.7% patients had hemorrhagic complications, while none of patients receiving LMWHs. An equal number of patients died.


CONCLUSIONS
Patients who were treated with LMWHs experienced less major adverse cardiac events and lower mortality. None suffered from hemorrhagic complications.
Petrović
Milovan
M
Institut za kardiovaskularne bolesti, Sremska Kamenica, Klinika za kardiologiju. nsbim@Eunet.yu
Panić
Gordana
G
Canji
Tibor
T
Srdanović
Ilija
I
Ivanović
Vladimir
V
Benc
Dragan
D
D000925:Anticoagulants / Q000627:therapeutic use*; D004562:Electrocardiography; D006495:Heparin, Low-Molecular-Weight / Q000627:therapeutic use*; D006801:Humans; D009203:Myocardial Infarction / Q000188:drug therapy* / Q000401:mortality / Q000503:physiopathology; D015996:Survival Rate; D015912:Thrombolytic Therapy
D000925:Anticoagulants; D006495:Heparin, Low-Molecular-Weight