OBJECTIVE:There is close relationship between abnormal coagulation system and progression of coronary heart disease (CHD), our purpose is to evaluate the contribution of hematologic factors and some other risk factors to the development of coronary heart disease (CHD) in Chinese population. METHODS:56 patients with CHD at admission and 54 controls were enrolled. Plasma levels of protein C, free protein S, total protein S, thrombomodulin, activated factor VII (FVIIa), factor VII:Ag, P-selectin, tissue-type plasminogen activator, plasminogen activator inhibitor-1 were measured by enzyme linked immunosorbent assay, activity of tissue factor (aTF) by chromogenic activity assay, and activated protein C (APC) ratio, prothrombin time, aPTT, fibrinogen, D-dimmer and thrombin time by full-automated coagulation analyzer. RESULTS:Compared with controls, plasma level of thrombomodulin, FVIIa, factor VII:Ag and aTF were raised in CHD group (p<0.05, 0.001, 0.05, and 0.05, respectively). The average APC ratio in CHD group was lower than that in controls (p<0.001). The result of binary logistic regression analysis showed that activated factor VII (OR2.680, 95%CI1.539-4.665) and tissue factor activity (OR1.019, 95%CI1.004-1.035) were risk factors and high density lipoprotein (OR0.008, 95%CI0-0.478) and activated protein C ratio (OR0.001, 95%CI0-0.011) were protective factors for CHD. CONCLUSIONS:Low activated protein C ratio, elevated tissue factor activity and increased activated factor VII in plasma may contribute to development of coronary heart disease.

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