The markers of cardiac fibrosis were studied in patients with coronary heart disease (CHD), arterial hypertension (AH) and atrial fibrillation (AF), as well as with CHD and AF without AH and in the group with isolated CHD. The change of levels of serum fibrosis markers were found in patients with coronary heart disease: C-terminal propeptide of procollagen I type (PICP), matrix metalloproteinase-9 (MMP-9), tissue inhibitor of metalloproteinase-1 (TIMP-1); the highest level was combined with hypertension and AF. The risk of CHD increases with increasing of concentrations of MMP-9 and PICP and decreasing of concentration of TIMP-1. Most predictive has MMP-9. The risk of progression of coronary artery disease increases when the level of MMP-9 more than 27.25 ng/ml, the level of PICP more than 99.6ng/ml, the level of TIMP-1 less than 465.3ng/ml. The risk of a critical stenosis of the coronary arteries increases with the level of MMP-9 more than 101.8ng/ ml, more values PICP 195.6ng/ml. The odds ratio for the MMP-9 was 3.41 (CI 1,38-8,47, P=0.007). The odds ratio for the PICP more than 195.6ng/ml was 4.66 (confidence interval 1,68-12,9; p=0.003).