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      Call for Papers: Green Renal Replacement Therapy: Caring for the Environment

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      Determinants of Cardiovascular Risk in Haemodialysis Patients: Post hoc Analyses of the AURORA Study

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          Abstract

          Background: Haemodialysis patients are at high risk for cardiovascular (CV) events. The aim of the current study was to characterise the role of traditional and uraemia-specific CV risk factors in this patient population. Methods: A post hoc analysis of the AURORA trial which enrolled 2,776 haemodialysis patients from 280 centres and had a mean follow-up period of 3.2 years. Determinants of CV endpoints (time to major cardiovascular event (MACE), cardiac event, CV death) were identified by univariate Cox regression analysis. Subsequently, independent determinants were identified by multivariate regression analysis. Results: For the primary endpoint MACE (myocardial infarction, stroke and cardiac death), multivariate analysis revealed that independent determinants were: age (hazard ratio (HR) 1.03 per year), serum phosphate level (HR 1.50 per mmol/l), albumin level (HR 0.94 per g/l), years on haemodialysis (HR 1.03 per year), diabetes mellitus (HR 1.38), preexisting coronary heart disease (HR 1.54) and C-reactive protein (CRP) level (HR 1.14 per mg/l). However, conventional risk factors such as smoking, dyslipidaemia, systolic and diastolic blood pressure and pulse pressure had no significant effect. Conclusions : Although we identify CRP, low albumin, and high phosphorus as risk factors for MACE, lowering CRP did not influence MACE outcomes in our trial. Caution is therefore warranted in implying risk factors being causal in end-stage renal disease.

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          Rosuvastatin and cardiovascular events in patients undergoing hemodialysis.

          Bengt C Fellström, Alan Jardine, Roland E Schmieder … (2009)
          Statins reduce the incidence of cardiovascular events in patients at high cardiovascular risk. However, a benefit of statins in such patients who are undergoing hemodialysis has not been proved. We conducted an international, multicenter, randomized, double-blind, prospective trial involving 2776 patients, 50 to 80 years of age, who were undergoing maintenance hemodialysis. We randomly assigned patients to receive rosuvastatin, 10 mg daily, or placebo. The combined primary end point was death from cardiovascular causes, nonfatal myocardial infarction, or nonfatal stroke. Secondary end points included death from all causes and individual cardiac and vascular events. After 3 months, the mean reduction in low-density lipoprotein (LDL) cholesterol levels was 43% in patients receiving rosuvastatin, from a mean baseline level of 100 mg per deciliter (2.6 mmol per liter). During a median follow-up period of 3.8 years, 396 patients in the rosuvastatin group and 408 patients in the placebo group reached the primary end point (9.2 and 9.5 events per 100 patient-years, respectively; hazard ratio for the combined end point in the rosuvastatin group vs. the placebo group, 0.96; 95% confidence interval [CI], 0.84 to 1.11; P=0.59). Rosuvastatin had no effect on individual components of the primary end point. There was also no significant effect on all-cause mortality (13.5 vs. 14.0 events per 100 patient-years; hazard ratio, 0.96; 95% CI, 0.86 to 1.07; P=0.51). In patients undergoing hemodialysis, the initiation of treatment with rosuvastatin lowered the LDL cholesterol level but had no significant effect on the composite primary end point of death from cardiovascular causes, nonfatal myocardial infarction, or nonfatal stroke. (ClinicalTrials.gov number, NCT00240331.) 2009 Massachusetts Medical Society
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            Atherosclerotic cardiovascular disease risks in chronic hemodialysis patients.

            Benjamin Dwyer, Kenneth Levey, R Heyka … (2000)
            Cardiovascular diseases are the most common causes of death among chronic hemodialysis patients, yet the risk factors for these events have not been well established. In this cross-sectional study, we examined the relationship between several traditional cardiovascular disease risk factors and the presence or history of cardiovascular events in 936 hemodialysis patients enrolled in the baseline phase of the Hemodialysis Study sponsored by the U.S. National Institutes of Health. The adjusted odds ratios for each of the selected risk factors were estimated using a multivariable logistic regression model, controlling for the remaining risk factors, clinical center, and years on dialysis. Forty percent of the patients had coronary heart disease. Nineteen percent had cerebrovascular disease, and 23% had peripheral vascular disease. As expected, diabetes and smoking were strongly associated with cardiovascular diseases. Increasing age was also an important contributor, especially in the group less than 55 years and in nondiabetic patients. Black race was associated with a lower risk of cardiovascular diseases than non-blacks. Interestingly, neither serum total cholesterol nor predialysis systolic blood pressure was associated with coronary heart disease, cerebrovascular disease, or peripheral vascular disease. Further estimation of the coronary risks in our cohort using the Framingham coronary point score suggests that traditional risk factors are inadequate predictors of coronary heart disease in hemodialysis patients. Some of the traditional coronary risk factors in the general population appear to be also applicable to the hemodialysis population, while other factors did not correlate with atherosclerotic cardiovascular diseases in this cross-sectional study. Nontraditional risk factors, including the uremic milieu and perhaps the hemodialysis procedure itself, are likely to be contributory. Further studies are necessary to define the cardiovascular risk factors in order to devise preventive and interventional strategies for the chronic hemodialysis population.
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              Vitamin D deficiency is associated with sudden cardiac death, combined cardiovascular events, and mortality in haemodialysis patients

              Christiane Drechsler, Stefan Pilz, Barbara Obermayer-Pietsch … (2010)
              Aims Dialysis patients experience an excess mortality, predominantly of sudden cardiac death (SCD). Accumulating evidence suggests a role of vitamin D for myocardial and overall health. This study investigated the impact of vitamin D status on cardiovascular outcomes and fatal infections in haemodialysis patients. Methods and results 25-hydroxyvitamin D [25(OH)D] was measured in 1108 diabetic haemodialysis patients who participated in the German Diabetes and Dialysis Study and were followed up for a median of 4 years. By Cox regression analyses, we determined hazard ratios (HR) for pre-specified, adjudicated endpoints according to baseline 25(OH)D levels: SCD (n = 146), myocardial infarction (MI, n = 174), stroke (n = 89), cardiovascular events (CVE, n = 414), death due to heart failure (n = 37), fatal infection (n = 111), and all-cause mortality (n = 545). Patients had a mean age of 66 ± 8 years (54% male) and median 25(OH)D of 39 nmol/L (interquartile range: 28–55). Patients with severe vitamin D deficiency [25(OH)D of≤ 25 nmol/L] had a 3-fold higher risk of SCD compared with those with sufficient 25(OH)D levels >75 nmol/L [HR: 2.99, 95% confidence interval (CI): 1.39–6.40]. Furthermore, CVE and all-cause mortality were strongly increased (HR: 1.78, 95% CI: 1.18–2.69, and HR: 1.74, 95% CI: 1.22–2.47, respectively), all persisting in multivariate models. There were borderline non-significant associations with stroke and fatal infection while MI and deaths due to heart failure were not meaningfully affected. Conclusion Severe vitamin D deficiency was strongly associated with SCD, CVE, and mortality, and there were borderline associations with stroke and fatal infection. Whether vitamin D supplementation decreases adverse outcomes requires further evaluation.
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                Author and article information

                Journal
                Journal ID (publisher-id): AJN
                Journal ID (nlm-ta): Am J Nephrol
                Journal ID (doi): 10.1159/issn.0250-8095
                Title: American Journal of Nephrology
                Publisher: S. Karger AG
                ISSN (Print): 0250-8095
                ISSN (Electronic): 1421-9670
                Publication date Subscription-year: 2013
                Publication date (Print): March 2013
                Publication date (Electronic): 31 January 2013
                Volume: 37
                Issue: 2
                Pages: 144-151
                Affiliations
                aRenal Research Group, British Heart Foundation Cardiovascular Research Centre, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, UK; bDivision of Nephrology, Department of Medicine, University Hospital Würzburg, Würzburg, Germany; cMedical Department, Rikshospitalet, University of Oslo, and dDepartment of Preventive Cardiology, Centre of Preventive Medicine, Oslo University Hospital, Ullevål, Oslo, Norway; eRenal Unit, Department of Medical Science, University Hospital, Uppsala, Sweden; fDepartment of Cardiology, Centre d’Investigation Clinique 9501 and Unité 961, Nancy University, Nancy, France; gDepartment of Nephrology and Hypertension, University Hospital Erlangen, Erlangen, Germany
                Author notes
                *Andreas Schneider, MD, Division of Nephrology, University of Würzburg, Oberdürrbacherstrasse 6, DE–97080 Würzburg (Germany), E-Mail schneider_a6@medizin.uni-wuerzburg.de
                Article
                Publisher ID: 346710 Other ID: Am J Nephrol 2013;37:144–151
                DOI: 10.1159/000346710
                PubMed ID: 23392089
                SO-VID: 0ddd32eb-c38f-49e1-9a28-e9a2dcf203fd
                Copyright © © 2013 S. Karger AG, Basel
                License:

                Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

                History
                Date received : 28 October 2012
                Date accepted : 23 December 2012
                Page count
                Figures: 1, Tables: 4, Pages: 8
                Categories
                Subject: Original Report: Patient-Oriented, Translational Research

                ScienceOpen disciplines: Cardiovascular Medicine,Nephrology
                Keywords: Cardiovascular events,Haemodialysis,Epidemiology
                Data availability:
                ScienceOpen disciplines: Cardiovascular Medicine, Nephrology
                Keywords: Cardiovascular events, Haemodialysis, Epidemiology

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