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      Clinical Implication of the Renin-angiotensin-aldosterone Blockers in Chronic Kidney Disease Undergoing Hemodialysis

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          Abstract

          The renin-angiotensin-aldosterone system (RAAS) blockers have been widely used in chronic kidney disease patients undergoing hemodialysis; however, whether RAAS blockers have beneficial effects for cardiovascular disease in those patients has not been fully defined. This review focuses on the effects of RAAS blockers in chronic kidney disease undergoing hemodialysis for cardiovascular disease.

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          Most cited references39

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          Prevalence, treatment, and control of hypertension in chronic hemodialysis patients in the United States.

          Hypertension is common in chronic hemodialysis patients, yet there are limited data on the epidemiology of hypertension in these patients in the United States. We assessed the prevalence, treatment, and control of hypertension in a cohort of 2535 clinically stable, adult hemodialysis patients who participated in a multicenter study of the safety and tolerability of an intravenous iron preparation. Hypertension was defined as an average predialysis systolic blood pressure >150 mm Hg or diastolic blood pressure >85 mm Hg, or the use of antihypertensive medications. Hypertension was documented in 86% (n = 2173) of patients. The prevalence of hypertension, in contrast to that observed in the general population, did not increase linearly with age and was not affected by sex or ethnicity. Hypertension was controlled adequately in only 30% (n = 659) of the hypertensive patients. In the remaining patients, hypertension was either untreated (12% [252/2173]) or treated inadequately (58% [1262/2173]). Control of hypertension, particularly systolic hypertension, in chronic hemodialysis patients in the United States is inadequate, despite recognition of its prevalence and the frequent use of antihypertensive drugs. Optimizing the use of medications and closer attention to nonpharmacologic interventions, such as adjustment of dry weight, a low-sodium diet, and exercise, may improve control.
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            Prevention of cardiovascular events in end-stage renal disease: results of a randomized trial of fosinopril and implications for future studies.

            Cardiovascular events (CVEs) are the leading cause of death in chronic hemodialysis patients. Results of trials in non-end-stage renal disease (ESRD) patients cannot be extrapolated to patients with ESRD. It is critical to test cardiovascular therapies in these high-risk patients who are usually excluded from major cardiovascular trials. The study objective was to evaluate the effect of fosinopril on CVEs in patients with ESRD. Eligible patients were randomized to fosinopril 5 mg titrated to 20 mg daily (n=196) or placebo (n=201) plus conventional therapy for 24 months. The primary end point was combined fatal and nonfatal first major CVEs (cardiovascular death, resuscitated death, nonfatal stroke, heart failure, myocardial infarction, or revascularization). No significant benefit for fosinopril was observed in the intent to treat analysis (n=397) after adjusting for independent predictors of CVEs (RR=0.93, 95% confidence interval (CI) 0.68-1.26, P=0.35). The per protocol secondary supportive analysis (n=380) found a trend towards benefit for fosinopril (adjusted RR=0.79 (95% CI 0.59-1.1, P=0.099)). In the patients who were hypertensive at baseline, systolic and diastolic blood pressures were significantly decreased in the fosinopril as compared to the placebo group. After adjustment for risk factors, trends were observed suggesting fosinopril may be associated with a lower risk of CVEs. These trends may have become statistically significant had the sample size been larger, and these findings warrant further study.
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              Candesartan, an angiotensin II type-1 receptor blocker, reduces cardiovascular events in patients on chronic haemodialysis--a randomized study.

              Cardiovascular events are the major determinants of the prognosis of patients on chronic haemodialysis. The present study was designed to investigate whether candesartan, an angiotensin II type-1 receptor blocker, reduces the incidence of cardiovascular events in these patients. A total of 80 chronic haemodialysis patients (male/female, 47/33; mean age +/- SEM, 61 +/- 1 years) in stable condition and with no clinical evidence of cardiac disorders were enrolled. Patients were randomly assigned candesartan 4-8 mg/day (candesartan group; n = 43) or nothing (control group; n = 37), and followed for 19.4 +/- 1.2 months with as endpoint cardiovascular events such as fatal/nonfatal myocardial infarction, unstable angina pectoris, congestive heart failure, severe arrhythmia and sudden death. Both groups exhibited similar clinical characteristics at baseline. During follow-up, cardiovascular events occurred in seven patients in the candesartan group and 17 in the control group. Kaplan-Meier analysis revealed that cardiovascular events and mortality rates were significantly (P < 0.01) higher in the control group than in the candesartan group (45.9 vs 16.3% and 18.9 vs 0.0%, respectively). Candesartan therapy significantly reduces cardiovascular events and mortality in patients on chronic maintenance haemodialysis and therefore improves the prognosis of these patients.
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                Author and article information

                Journal
                Open Cardiovasc Med J
                Open Cardiovasc Med J
                TOCMJ
                The Open Cardiovascular Medicine Journal
                Bentham Open
                1874-1924
                7 February 2014
                2014
                : 8
                : 6-11
                Affiliations
                [1 ]Division of Nephrology, Department of Medicine, Jichi Medical University, Tochigi, Japan
                [2 ]Utsunomiya Social Insurance Hospital, Tochigi, Japan
                Author notes
                [* ]Address correspondence to this author at the Division of Nephrology, Department of Medicine, Jichi Medical University, 3311-1, Yakushiji, Shimotsuke-city, Tochigi 329-0498, Japan; Tel.: 81-285-44-4869, Fax: 81-285-44-4869; E-mail: ymori@ 123456jichi.ac.jp
                Article
                TOCMJ-8-6
                10.2174/1874192401408010006
                3944431
                ee44bfba-6c61-4b9f-937c-ea64052e2134
                © Morishita et al.; Licensee Bentham Open.

                This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License ( http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

                History
                : 1 January 2013
                : 1 January 2014
                : 5 January 2014
                Categories
                Article

                Cardiovascular Medicine
                hemodialysis,clinical study,renin,angiotensin i,angiotensin ii,aldosterone,angiotensin-converting enzyme inhibitor,angiotensin receptor blockers,direct renin inhibitor,cardiovascular disease.

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