Significance of Urinary Liver-fatty Acid-binding Protein in Cardiac Catheterization in Patients with Coronary Artery Disease

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Objectives We investigated the significance of urinary liver fatty acid-binding protein (U-L-FABP) monitoring during cardiac catheterization in patients with cardiovascular disease (CVD). Methods The subjects included 27 consecutive patients with stable angina (SAP group) or acute coronary syndrome (ACS group) who had undergone successful percutaneous coronary intervention (PCI), and 12 patients were also enrolled as controls (C group). Urinary and serum parameters were measured immediately before and after and 1 day after PCI. Results The ratio of U-L-FABP to U-creatinine (U-Cr) (U-L-FABP/U-Cr) in the ACS group was significantly higher than those in both the SAP and C groups before PCI. In addition, none of the patients in the SAP group showed contrast-induced nephropathy (CIN) based on the levels of serum (S)-Cr and U-L-FABP/U-Cr after PCI. Although none of the patients in the ACS group showed CIN according to S-Cr, the level of U-L-FABP/U-Cr was continuously high throughout the study period. Moreover, since there were significant differences in U-L-FABP/U-Cr, U-N-acetyl-β-D-glucosaminidase, S-uric acid and % medication with calcium channel blockers before PCI between the ACS and SAP groups, a multiple regression analysis was performed using these parameters. It showed that U-L-FABP/U-Cr was most closely associated with the classification of SAP and ACS (p<0.0001). The cut-off level for the greatest sensitivity and specificity for U-L-FABP for the diagnosis of ACS was 13.4 μg/g· Cr in all subjects (sensitivity 0.800, specificity 0.963). Conclusions To the best of our knowledge, this is the first report incicating that the measurement of U-L-FABP can be beneficial for in the diagnosis of ACS.

Significance of Urinary Liver-fatty Acid-binding Protein in Cardiac Catheterization in Patients with Coronary Artery Disease

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