C-Reactive Protein and the Risk of Contrast-Induced Acute Kidney Injury in Patients Undergoing Percutaneous Coronary InterventionGao F. · Zhou Y.J. · Zhu X. · Wang Z.J. · Yang S.W. · Shen H.
Department of Cardiology, An Zhen Hospital, Capital Medical University, Beijing, China
Background: The relationship between preprocedural C-reactive protein (CRP) levels and the incidence of contrast-induced acute kidney injury (CI-AKI) is unknown. Methods: Documents of 7,310 consecutive patients undergoing percutaneous coronary intervention (PCI) were screened. Patients with acute myocardial infarction, cardiogenic shock, concomitant inflammatory conditions or undergoing CABG within 48 h were excluded due to potential confounding effects. Results: A total of 4,522 patients were valid for analysis. The median follow-up was 26 months (interquartile range 20–33 months). According to preprocedural CRP values, patients were divided into 3 groups: group 1: CRP <1.0 mg/l (n = 1,523); group 2: 1.0 mg/l ≤ CRP ≤ 3.0 mg/l (n = 1,626); group 3: CRP >3.0 mg/l (n = 1,373). Patients with higher preprocedural CRP levels were associated with a significantly increased rate of CI-AKI (10.6 vs. 14.9 vs. 23.5%, p < 0.0001). After adjustment for baseline covariates, CRP level was still an independent predictor for the incidence of CI-AKI, either as a continuous variable or a categorical variable. Patients with higher CRP values had a significantly higher rate of all-cause mortality and myocardial infarction during follow-up. Conclusion: Elevated preprocedural CRP is associated with an increased risk for CI-AKI in patients undergoing PCI. Preprocedural risk stratification with CRP as an adjunct to established clinical risk factors might be useful.
© 2011 S. Karger AG, Basel
Received: March 14, 2011
Accepted: May 19, 2011
Published online: July 23, 2011
Number of Print Pages : 8
Number of Figures : 1, Number of Tables : 4, Number of References : 30
American Journal of Nephrology
Vol. 34, No. 3, Year 2011 (Cover Date: September 2011)
Journal Editor: Bakris G. (Chicago, Ill.)
ISSN: 0250-8095 (Print), eISSN: 1421-9670 (Online)
For additional information: http://www.karger.com/AJN