[Non-ST elevation acute coronary syndrome: changes of parameters of hemostasis during and after treatment with unfractionated heparin and enoxaparin].
OBJECTIVE
To compare changes of parameters of hemostasis in patients with non-ST elevation acute coronary syndrome (NSTEACS) during and after treatment with unfractionated heparin (UFH) and low molecular weight heparin (LMWH) enoxaparin.


METHODS
Control groups of 2 randomized studies of effects of thienopyridines in NSTEACS with similar inclusion criteria.


METHODS
In patients (n=18) of study one UFH was infused intravenously for 54.2+/-22.3 h, in patients of study two subcutaneous enoxaparin 1 mg/kg b.i.d. was used for 76.2+/-28.3 h. Levels of D-dimer (DD), thrombin-antithrombin complex (TAT), prothrombin fragment 1+2 (F1+2), von Willebrand factor (vWF), fibrinogen, tissue plasminogen activator (TPA) and activity of its inhibitor (PAI), soon after start of treatment with heparins and in 1, 3, 7 and 14 days.


CONCLUSIONS
Short term lowering of DD and TAT levels occurred during UFH infusion apparently reflecting primary antithrombin action of UFH. During LMWH use DD level remained unchanged however its lowering was observed after cessation of LMWH (on days 7 and 14). The use of LMWH was not associated with increases of thrombinemia (TAT), thrombin generation (F1+2), and fibrinogen which were registered after end of UFH infusion (days 3, 7 and 14). Neither UFH nor LMWH prevented acute phase vWF elevation. The use of both heparins was associated with changes that could be interpreted as profibrinolytic. In LMWH treated patients these changes (elevations of TPA level) became manifested early (on day 3) and were short lived while in UFH treated patients they appeared later (on day 7) and were prolonged (as lowered PAI activity on day 14).
Averkov
O V
OV
Research Institute for Physicochemical Medicine, ul. Malaya Pirogovskaya 1a, 119828 Moscow, Russia.
Slavina
N N
NN
Dobrovol'skiĭ
A B
AB
Gratsianskiĭ
N A
NA
D000208:Acute Disease; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003327:Coronary Disease / Q000097:blood* / Q000188:drug therapy; D017984:Enoxaparin / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D005260:Female; D005343:Fibrinolytic Agents / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D006487:Hemostasis / Q000187:drug effects*; D006493:Heparin / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D006801:Humans; D008297:Male; D008875:Middle Aged; D016032:Randomized Controlled Trials as Topic; D012189:Retrospective Studies; D013577:Syndrome
D017984:Enoxaparin; D005343:Fibrinolytic Agents; D006493:Heparin