• A E Ebru, A Kilic, F S Korkmaz, R Seker, H Sasmaz, S Demirtas, and Z Biyikli.
• Department of Cardiology, Ufuk University, Ankara, Turkey.
• J Postgrad Med. 2014 Apr 1; 60 (2): 135-40.

Background/AimsThe aim of this study was to assess whether changes in Cystatin C (CyC) after 48 h post contrast media exposure was a reliable indicator of acute kidney injury and the validity of a risk scoring tool for contrast-induced acute kidney injury (CI-AKI).Materials And MethodsWe enrolled 121 patients for whom diagnostic coronary angiography were planned. The risk score for CI-AKI was calculated and serum creatinine (sCr) and CyC were measured before and 48 h post coronary angiography. CyC and sCr based AKI was calculated as a 25% increase from baseline within 48 h from contrast media exposure.ResultsMean serum CyC and creatinine concentrations were 0.88 ± 0.27 mg/dL and 0.79 ± 0.22 mg/dL, respectively before the procedure and 1.07 ± 0.47 mg/dL and 0.89 ± 0.36 mg/dL, respectively 48 h after contrast media exposure (P < 0.001). CyC based AKI occurred in 45 patients (37.19 %) and sCr based AKI occurred in 20 patients (16.52%) after the procedure. Mean risk score was found to be 4.00 ± 3.478 and 3.60 ± 4.122 for CyC based AKI and sCr based AKI, respectively and was significantly increased in CyC based AKI group (P < 0.001).ConclusionsCyC measured 48 h after contrast media exposure may be a more sensitive indicator of CI-AKI relative to creatinine and Mehran risk scoring is in good correlation with CyC increase.

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