Total cholesterol as well as cholesterol of low and high density lipoproteins, lipid peroxidation products (LPP), such as dienic conjugates and compounds reacting with thiobarbituric acid, were measured in a single blood sample from each of the 295 patients with CHD and 20 apparently healthy subjects. FC II and III angina was diagnosed in 142 and 151 CHD patients respectively. Certain samples were used to additionally detect homocysteine, activity of anti-oxidative enzymes (superoxide dismutase and glutathione peroxidase) in erythrocytes and ceruloplasmin/transferrin anti-oxidative system in plasma. Patients with FC III angina had significantly higher LPP levels but lower activity of tissue and plasma anti-oxidative systems than patients with FC II angina or healthy subjects. Patients with stable forms of CHD showed correlation between lipid composition, LPP contents, homocysteine level, and activity of anti-oxidative enzymes.