Abstract
To investigate the predictive value of cystatin C among patients diagnosed with non-ST-elevation acute coronary syndrome (nSTE-ACS). Admission serum samples from 245 nSTE-ACS patients were measured with a novel cystatin C immunoassay based on a dry-reagent, double monoclonal design. Creatinine concentrations, estimated glomerular filtration rates (eGFR) and one-year follow-up data were available for these patients. During the follow-up period, 34 (14%) of patients had myocardial infarction (MI) and 25 (11%) died. Increased serum cystatin C was an independent predictor of all-cause mortality and combined events (all-cause mortality and MI) after adjustment to non-biomarker baseline factors, hazard ratio (HR) 2.19 (per increase of 1 tertile; 95% Cl 1.28-3.78, p=0.0046) and 1.75 (1.22-2.51, p=0.0024), respectively. Corresponding values for eGFR were 2.56 (1.43-4.59, p=0.0016) and 1.76 (1.23-2.53, p=0.0022), respectively. Creatinine was not an independent predictor of endpoints (p>0.05). Cystatin C was associated with an increased risk of death and combined events in patients with nSTE-ACS.
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