Baseline characteristics and prescription patterns of standard drugs in patients with angiographically determined coronary artery disease and renal failure (CAD-REF Registry)

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Abstract

© 2016 Reinecke et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Background Chronic kidney disease (CKD) is strongly associated with coronary artery disease (CAD). We established a prospective observational nationwide multicenter registry to evaluate current treatment and outcomes in patients with both CKD and angiographically documented CAD. Methods In 32 cardiological centers 3,352 CAD patients with≥50% stenosis in at least one coronary artery were enrolled and classified according to their estimated glomerular filtration rate and proteinuria into one of five stages of CKD or as a control group. Results 2,723 (81.2%) consecutively enrolled patients suffered fromCKD. Compared to controls, CKD patients had a higher prevalence of diabetes, hypertension, peripheral artery diseases, heart failure, and valvular heart disease (each p < 0.001).Myocardial infarctions (p = 0.02), coronary bypass grafting, valve replacements and pacemaker implantations had been recorded more frequently (each p < 0.001).With advanced CKD, the number of diseased coronary vessels and the proportion of patients with reduced left ventricular ejection fraction (LVEF) increased significantly (both p < 0.001). Percutaneous coronary interventions were performed less frequently (p < 0.001) while coronary bypass grafting was recommendedmore often (p = 0.04) with advanced CKD.With regard to standard drugs in CAD treatment, prescriptions were higher in our registry than in previous reports, but beta-blockers (p = 0.008), and angiotensin- converting-enzyme inhibitors and/or angiotensin-receptor blockers (p < 0.001) were given less often in higher CKD stages. In contrast, in the subgroup of patients with moderately to severely reduced LVEF the prescription rates did not differ between CKD stages. In-hospital mortality increased stepwise with each CKD stage (p = 0.02). Conclusions In line with other studies comprising CKD cohorts, patients' morbidity and in-hospital mortality increased with the degree of renal impairment. Although cardiologists' drug prescription rates in CAD-REF were higher than in previous studies, they were still lower especially in advanced CKD stages compared to cohorts treated by nephrologists.

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Reinecke, H., Breithardt, G., Engelbertz, C., Schmieder, R. E., Fobker, M., Pinnschmidt, H. O., … Brand, E. (2016). Baseline characteristics and prescription patterns of standard drugs in patients with angiographically determined coronary artery disease and renal failure (CAD-REF Registry). PLoS ONE, 11(2). https://doi.org/10.1371/journal.pone.0148057

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