Association of serum fetuin-A levels with heart valve calci cation and other biomarkers of in ammation among persons with acute coronary syndrome Abstract Purpose: Fetuin-A is a multifunctional hepatic secretory protein that inhibits dystrophic vascular and valvular calci cation. Our aim was to evaluate the relationship among fetuin-A levels, heart valve calci cation and other biomarkers of in ammation in patients with acute coronary syndrome (ACS).Methods: e associations among serum fetuin-A concentrations, mitral annular (MAC) and aortic valve calci cation and other biomarkers of in ammation (hs-CRP, ferritin, -brinogen, white blood cell count (WBC), erythrocyte sedimentation rate (ESR), albumin levels) were evaluated in ACS patients and healthy controls. e study included 95 patients (mean age 61.8±12.10 years) and 81 healthy controls (mean age 48.33±9.19 years).Results: Fetuin-A levels were signi cantly lower in patients with ACS than in healthy controls (0.76 ± 0.23 and 1.10 ± 0.45 g/L, respectively; p<0.001). Fetuin-A was lower in patients with mitral annular calci cation (p=0.007) and aortic (p=0.001) valve calci cation. In patients with ACS, there was a negative correlation among serum urea (r=-0.377; p<0.001) and creatinine (r=-0.232; p=0.024) levels and fetuin-A, and a negative correlation among WBC (r=-0.156; p=0,132), ESR (r=-0.214; p=0.037), hs-CRP (r=-0.220; p=0.032) levels and fetuin-A. A positive correlation was seen between albumin and fetuin-A (r=0.362; p<0.001). Multivariate logistic regression analysis revealed that fetuin-A was the variable that had a signi cant e ect on ACS (p = 0.020 OR = .015; (95% CI )(0.000-0.520).Conclusion: Fetuin-A levels decrease in patients with acute coronary syndromes, independent of heart valve calci cation. Fetuin-A may therefore act as a negative acute phase protein a er myocardial infarction.