Proenkephalin for Prediction of Contrast-Associated Kidney Events

Blood will be drawn at three time-points: immediately before catherization, 12-24 hours after catheterization and 4-8 weeks after discharge. Creatinine will be measured for endpoint definition, while the markers urea, CRP (C-reactive protein), NGAL (neutrophil gelatinase-associated lipocalin), KIM-1 (kidney injury marker-1), cystatin C, suPAR (soluble urokinase-type plasminogen activator receptor), and penKid will be measured as biomarkers of interest.