Evaluation of Hemostasis in Patients with Coronary Heart Disease During Surgical Myocardial Revascularization

Abstract

Objective: to define the blood hemostatic potential in patients with chronic coronary heart disease and acute coronary syndrome (ACS). Subjects and methods. The investigation is based on the in-depth dynamic clinicobiochemical study of 43 patients who has undergone surgical myocardial revascularization under extracorporeal circulation. Ten current standardized laboratory tests were used to evaluate the hemostatic system. At the stages of the investigation, the parameters of the latter were determined and the blood hemostatic potential was estimated in the patients with coronary heart disease. Results. The investigation has indicated that in patients with chronic heart disease, hypercoagulation was compensated due to the changes in the anticoagulation and fibrinolytic systems. In patients with the acute coronary syndrome, the indices of the external and internal mechanisms of coagulation were in the normal physiological range at all the stages of the investigation, even at its stage 3 whereas the parameters, such as the levels of soluble fibrin monomer complex (SFMC), fibrinogen, and D-dimers, suggest thrombinemia and activated coagulation. Conclusion. The absence of activation of the external and internal coagulation pathways with the elevated level of markers of activated coagulation of SFMC and D-dimers in patients with ACS is not that of activation, as such. The patients of this group show a reduction in coagulation factors due to their uptake for the stabilization of the functional status of the hemostatic system. The investigation has demonstrated that in patients with chronic coronary heart disease, the spare capacities of the hemostatic system are higher due to no deficit of individual coagulation factors and to the higher spare capacities of the fibrinolytic system. Key words: hemostat-ic system, acute coronary syndrome, hypercoagulation, fibrinolysis, D-dimers.