Interv Akut Kardiol. 2003;2(4):178-183
Účel studie: Porovnat účinnost nefrakcionovaného heparinu (UFH) a nízkomolekulárního heparinu (LMWH) – dalteparinu – během perkutánní koronární intervence (PCI), porovnat jejich vliv na krevní destičky a „rebound“ fenomén po jejich vysazení.
Použité metody: V randomizované studii byl 340 pacientům podán UFH 100 j/kg tělesné hmotnosti nebo dalteparin 80 j/kg i. v. U všech pacientů byl sledován klinický průběh, u sta pacientů byla sledována účinnost antikoagulace, agregační odpověď trombocytů, hladiny betatromboglobulinu (beta-TG), tromboxanu B2 (TxB2), trombin-antitrombinového komplexu (TAT), protrombin degradačních produktů (F1, F2) a počty trombocytů před a po PCI.
Výsledky: Hladina anti-Xa byla pět minut po podání dalteparinu 1,9; jednu hodinu po podání 1,2 a pět hodin po podání 0,4 IU/ml. APTT (poměr) byl pět minut po podání UFH 5,3; jednu hodinu po podání 5,0 a pět hodin po podání 1,1. Agregace trombocytů byla po pěti minutách po podání UFH významně vyšší, než po podání dalteparinu po indukci adrenalinem (p
Aim of the study: To compare the efficiency of unfractionated heparin (UFH) with low-molecular weight heparin (LMWH) – dalteparin – during percutaneous coronary interventions (PCI), to compare their effect on platelets and the „rebound“ phemonenon after their cessation.
Methods: UFH in the dose of 100 units/kg of body weight or dalteparin in the dose of 80 units/kg were given intravenously to 340 patients in a randomized study. The clinical course was studied in all patients. The efficiency of anticoagulation, aggregation response of platelets, levels of betathromboglobulin (beta-TG), thromboxan B2 (TxB2), trombin-antithrombin complex (TAT), prothrombin degradation products (F1, F2) and the platelet count before and after PCI were studied in 100 patients.
Results: The level of anti-Xa was 1,9 five minutes after the administration of dalteparin, 1.2 one hour after the administration and 0,4 IU/ml 5 hours after the administration. APTT was 5.3 five minutes after the administration of UFH, 5.0 one hour after the administration and 1.1 five hours after the administration. We have found higher platelet aggregation five minutes after the administration of UFH compared to dalteparin after the induction by epinephrine (p < 0,01), thrombin and arachidonic acid (both p < 0.05). The level of beta-TG decreased five minutes after dalteparin bolus from 78.3 to 63.1 (p < 0.01), after UFH bolus from 75.9 to 71.2 IU/ml (NS). There was no change in the level of TxB2 in both groups. The level of TAT decreased five hours after the administration of dalteparin from 14 to 8.6 µg/l (<0.05), the level of F1, F2 increased after the administration of UFH from 1.1 to 1.6 nmol/l (p < 0.05). Platelet count decreased after the PCI in both groups (both p < 0.001).
Conclusions: The administration of the above mentioned doses of UFH or dalteparin during PCI is safe. The activation of platelets is less pronounced after dalteparin administration. Five hours after the UFH administration but not after the dalteparin administration the reactivation of coagulation cascade was detectable. Both UFH and dalteparin caused significant decrease of platelet count. The potencial advantages of dalteparin have not influenced the clinical course.
Zveřejněno: 31. prosinec 2003 Zobrazit citaci
ACS | AIP | APA | ASA | Harvard | Chicago | Chicago Notes | IEEE | ISO690 | MLA | NLM | Turabian | Vancouver |