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Objective: To determine the possible differences in lipid, thrombogenic and inflammatory marker concentrations and the presence of chronic and acute coronary artery disease (stable and unstable angina, respectively), comparing them with a group of control patients with normal coronary arteries. Material and Methods: This prospective cohort study included 125 patients with unstable angina, 189 with stable angina and a control group of 83 patients with normal coronary arteries. Marker concentrations were measured in all 3 groups. Logistic regression analysis was performed to determine whether such factors could predict unstable or stable angina. Results: Lipid parameter concentrations were similar in the 2 coronary disease groups and significantly lower than in controls. Haemostatic and inflammatory marker concentrations were higher in patients with coronary disease, but were statistically significant only when comparing unstable angina patients with normal controls. Unstable angina patients had significantly higher levels of lipoprotein (a) [Lp(a)], fibrinogen, C-reactive protein (CRP) and leucocytes. Multiple logistic regression analysis showed that CRP (OR 2.635, 95% CI 1.417–4.898), smoking (OR 3.416, 95% CI 1.773–6.584), leucocytes (OR 2.034, 95% CI 1.079–3.836) and Lp(a) (OR 2.269, 95% CI 1.188–4.334) were independent risk factors of unstable versus stable angina. Conclusions: Patients with unstable angina present a more atherogenic profile than patients with stable angina. Together with smoking, elevated Lp(a), CRP and leucocyte concentrations proved to be associated with the presence of unstable angina.

The aim of this work was to investigate the relationship between different lipids parameters with presence and severity of coronary obstruction angiographically evaluated. 897 patients (629 men and 268 women) underwent an angiography and blood extraction to determine concentrations of lipid markers: total cholesterol (TC), HDL cholesterol (HDLc), triglycerides, LDL cholesterol (LDLc), apolipoprotein A1 (apoA1), apolipoprotein B100 (apoB), non-HDL cholesterol and total cholesterol/HDLc, apoB100/apoA1 and LDLc/HDLc ratios. Multivariate analysis revealed that low HDLc levels were independently associated with the presence of coronary obstruction (OR: 0.982, 95% CI 0.969–0.996). In relation to severity of coronary stenosis, only apoA1 levels (OR: 0.990, 95% CI 0.980–1.000) and apoB/apoA1 ratio (OR: 3.243, 95% CI 1.095–9.608) were independent predictors. Our study demonstrated that HDLc was the only lipid parameter negatively and significantly associated with the presence of coronary obstruction, whereas apoA1 levels and apoB/apoA1 ratio were independent predictors of stenosis severity.

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