Hypertension and nephrology

[Restless legs syndrome in patients with chronic kidney disease]

LINDNER Anett1,2, FORNÁDI Katalin1,2, MOLNÁR Miklós Zsolt1,3,4

APRIL 20, 2011

Hypertension and nephrology - 2011;15(02)

[The aging of the population, the high prevalence of chronic diseases and the consequent rapid increase of healthcare expenditures present a difficult challenge for the medical care system and for the society in the developed countries. Sleep disorders are increasingly recognized as very frequent chronic diseases with significant pathophysiological and psychosocial consequences. In the last 20 years an increasing number of studies reported high prevalence of sleep disorders, such as restless legs syndrome in patients with kidney disease. Chronic renal failure is the most common condition presenting with secondary restless legs syndrome. It is associated with insomnia, depressive symptoms and anxiety, impaired quality of life, as well as elevated cardiovascular risk. Compliance of the patients with restless legs syndrome is decreased, and it is more likely that they discontinue dialysis treatment. This may be related to higher mortality in kidney disease patients with restless legs syndrome.]


  1. Semmelweis Egyetem, Magatartástudományi Intézet, Alvásmedicina és Pszichonefrológia Munkacsoport, Budapest
  2. Semmelweis Egyetem, Neurológiai Klinika, Budapest
  3. Semmelweis Egyetem, Kórélettani Intézet, Budapest
  4. Harold Simmons Center for Chronic Disease Research & Epidemiology, Los Angeles, Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA, USA



Further articles in this publication

Hypertension and nephrology

[Perindopril plus Indapamid CombinAtion blood preSSure reductiOn study (PICASSO)]

[INTRODUCTION - International and Hungarian (JNC-7, ESH/ESC2007 és 2009, MHT 2009) Guidelines suggest a target blood pressure <140/90 mmHg for hypertensive patients, and <130/80 mmHg for those with high/very high cardiovascular risk (e.g. patients with diabetes mellitus, chronic renal disease). It was proved that for achieving the most efficient antihypertensive effect and reducing side effects, thd use of drug combinations is needed in most patients. In Hungary, ACE-inhibitor plus diuretic combination is one of the most frequently used one in Hungary. The vérnyomáscsökaim of the PICASSO study was to evaluate the efficacy and metabolic effects of the fixed combination of high-dose perindopril plus indapamide (Coverex-AS Komb Forte®) in clinical practice of hypertonologists, cardiologists and general practicioners. PATIENTS AND METHODS - Patients with uncontrolled, grade 1 or 2 primary hypertension, age, >18 years were involved in the open, 3-month, multicentre, prospective, observational, non-interventional clinical study if the treating physician indicated a combination treatment with higher dose antihypertensive drugs. Blood pressure (also with ABPM), heart rate, metabolic parameters (plasma lipids, blood sugar, Na, K, creatinine, uric acid, GGT) were measured by routine methods, medical history and quality of life parameters were registered on a validated questionnaire. Changes in the above parameters were also separately evaluated in patients with different risk factors or with concomitant diseases. RESULTS - Data of 9683 patients were evaluated (54% women, 46% men, average age 61.8 years). By the end of the therapy used in the study, blood pressure average decreased from 159/93 to 131/80, by ABPM from 145/83 to 126/74 mmHg (24hr averages, systolic/diastolic blood pressure, respectively), the heart rate from 79 to 73 beats/min (p<0,001). Target blood pressure was achieved in 75,4% of patients with no major concomitant disease, but only in 14% of those with a concomitant disease characterised by lower target blood pressure. The diurnal index by ABPM did not change substantially. Clinically significant decreases were found in the plasma levels of total cholesterol, LDL-cholesterol, triglycerides, fasting glucose and uric acid levels, but there were no major changes in serum levels of HDLcholesterol, Na, K, and GGT. Quality of life parameters significantly improved by the end of the study. CONCLUSIONS - Combinations of perindopril and indapamide can be successfully and safely used in everyday practice.]

Hypertension and nephrology

[Water intoxication caused by diuretics]

RADÓ János, KOVÁCS Andrea

[Water metabolism in the organism is regulated very exactly under normal circumstances. Sometimes, however, when the level of the antidiuretic hormone is inappropriately high and fluid consuming is not limited, water intoxication can develop. This is especially paradoxical during treatment with diuretics. Authors observed in a cachectic, potassium wasting, 87-year-old female patient, hyponatremia associated with clinical water intoxication developing in a hot period of summer, during long-term thiazide diuretic (chlorthalidone) treatment administered because of high blood pressure. Diagnosis was based besides the clinical picture on the severe hyponatremia and was supported by the relatively high urine osmolality in the presence of a very low plasma osmolality. Despite treatment of hyponatremia in accordance to the recommandations “overcorrection” occurred and turned into fatal hypernatremia. In the period of low plasma osmolality the patient was treated with intravenous infusions containing isotonic saline supplemented with potassium. When hypertonicity developed hypotonic intravenous infusions were given. Authors discuss the literature of hyponatremia with special reference to the dilemmas of therapy such as “slow” versus “rapid” correction as well as procedures to be done in case of “overcorrection”.]

Hypertension and nephrology

[“Protecting our Vessels”. Continuing the “ÉRV” Program in 2011]

KISS István, KOLOSSVÁRY Endre, JÁRAI Zoltán, LUDÁNYI Andrea, FARKAS Katalin

Hypertension and nephrology

[Change in the approach of the treatment of hypertension in Hungary. Five years results of the „Live below 140/90!” Program]

KISS István, PÁL László, SCHANBERG Zsolt, BARNA István, ALFÖLDI Sándor, FARSANG Csaba, CHÁTEL de Rudolf, KÉKES Ede

[One of the potentials of the effective fight against endemic diseases is their exposition and the recognition of their dangers and risk factors. The other possibility is to increase the professional knowledge of the medical and healthcare employees along with the patients’ co-operation. For the prevention of complications and the adequate treatment of hypertension an extensive compliance program, called „Live below 140/90!” was initiated by the Hungarian Society of Hypertension in 2005. The mission was to give knowledge to the non-professional public about the symptoms of the disease and how to get information about it while helping patients’ relatives. The first message was the “Hit the target blood pressure value!”. With careful planning, treatment and taking of medicines the next phase could begin. The ratio of the patients who reached the target blood pressure increased by 5% during the two years of the Program between 2005 and 2007 therefore the message changed to “Hold the blood pressure there!”. The next step in the Program was to prevent the forming of complications and to treat the co-morbidities effectively among patients with pre-diabetes or diabetes and hypertension in 2008. The slogan was “Prevent the complications!”. As part of the Program we organized a roadshow named the “Day of caring!” and we announced the “Conscious Care” substudy focused on the public summoning about the stroke which is the most dangerous complication of hypertension. The year of 2011 is an absolutely new beginning in the communication of the Program since we started to use some very modern tools of the 21st century including YouTube, Facebook and others for the better education of the people. Based on the results of the initial Program we got to know the risks, co-morbidities, complications and the characteristics of the Hungarian hypertensive patients. We have recognized that most of the patients belong to the high and very high risk hypertensive category. Also more than 30 percent of them have a pre-diabetes condition. We have found that increased caring helps to build up the patients’ co-operation which in return improves the decrease of their blood pressure significantly. The Program therefore continues in 2011! Our intention is to enlarge the Hungarian Hypertension Register database and to get to know more and more epidemiologic and therapeutic features of the hypertension disease.]

Hypertension and nephrology

[Voiding sonocystography with ultrasound contrast material for the diagnosis of vesicoureteral reflux]


[Voiding sonocystography with intravesical administration of ultrasound contrast agent is a sensitive method to detect vesicoureteral reflux without irradiation. Depicting microbubbles in the ureters and collecting system is feasible even with very small amounts of a second-generation ultrasound contrast agent, Sonovue. The reflux is graded (I-V) in a similar manner to the system used in voiding cystourethrography. In this article a detailed description is presented.]

All articles in the issue

Related contents

Clinical Neuroscience

Risk factors for ischemic stroke and stroke subtypes in patients with chronic kidney disease

GÜLER Siber, NAKUS Engin, UTKU Ufuk

Background - The aim of this study was to compare ischemic stroke subtypes with the effects of risk factors, the relationship between grades of kidney disease and the severity of stroke subtypes. Methods - The current study was designed retrospectively and performed with data of patients who were hospitalised due to ischemic stroke. We included 198 subjects who were diagnosed with ischemic stroke of Grade 3 and above with chronic kidney disease. Results - In our study were reported advanced age, coronary artery disease, moderate kidney disease as the most frequent risk factors for cardioembolic etiology. Hypertension, hyperlipidemia, smoking and alcohol consumption were the most frequent risk factors for large-artery disease. Female sex and anaemia were the most frequent risk factors for small-vessel disease. Dialysis and severe kidney disease were the most frequent risk factors in unknown etiologies, while male sex, diabetes mellitus, prior stroke and mild kidney disease were the most frequent risk factors for other etiologies. National Institute of Health Stroke Scale (NIHSS) scores were lower for small-vessel disease compared with other etiologies. This relation was statistically significant (p=0.002). Conclusion - In order to improve the prognosis in ischemic stroke with chronic kidney disease, the risk factors have to be recognised and the treatment options must be modified according to those risk factors.

Hypertension and nephrology

[Plasma ortho-tyrosine/para-tyrosine ratio predicts hyporesponsiveness to erythropoiesis-stimulating agents in dialyzed patients]

KUN Szilárd, MIKOLÁS Esztella, MOLNÁR Gergő Attila, SÉLLEY Eszter, LACZY Boglárka, CSIKY Botond, KOVÁCS Tibor, WITTMANN István

[Objectives: Patients suffering from end-stage renal failure (ESRF) are mostly treated with erythropoiesis-stimulating agents (ESAs). They often show hyporesponsiveness to ESA, which condition is associated with elevated production of free radicals. Phenylalnine (Phe) is converted into para- and ortho-tyrosine (p- and o- Tyr) by hydroxyl free radical. o-Tyr is produced exclusively in this way. However, physiological isomer p-Tyr is formed in significantly higher amounts by phenylalaninehydroxylase, mainly in the kidney. It has been shown that p-Tyr production is decreased in ESRF. As a result, p-Tyr can be replaced by o-Tyr in proteins, e.g. in proteins playing part in signal transduction of erythropoietin. We aimed to study the association of different Tyr isoforms with ESA-responsiveness. Methods: Four groups of volunteers were involved in our cross-sectional study: healthy volunteers (CONTR; n=16), patients on hemodialysis without ESA-treatment (non-ESA-HD; n=8), hemodialyzed patients with ESA-treatment (ESA-HD; n=40) and patients on continuous peritoneal dialysis (CAPD; n=21). Plasma p-, o-Tyr and Phe levels were detected using a high performance liquid chromatography (HPLC)-method, with fluorescence detection. ESA-demand was expressed as ESA-dose, ESAdose/ body weight and erythropoietin resistance index1 (ERI1, weekly ESA-dose/body weight/hemoglobin). Multivariate regression models were used to examine predictors of ESA-demand. In these models, most of the known predictors of ESA-hyporesponsiveness were included. Results: Lower p-Tyr levels were found in dialyzed patients compared with control subjects. In contrast, o-Tyr levels and o-Tyr/p-Tyr ratios were higher in dialyzed patients. Regarding dialyzed patients, o-Tyr level and o-Tyr/p-Tyr ratio were higher in ESA-HD than in non-ESA-HD and CAPD groups. Weekly ESA-dose/body weight and ERI1 correlated with o-Tyr/p-Tyr ratio (r=0.441, p=0.001; r=0.434, p=0.001, respectively). Finally, o-Tyr/p-Tyr ratio proved to be an independent predictor of ERI1 (β=0.330, p=0.016). Discussion: Our results suggest that elevation of o-Tyr/p-Tyr ratio could be responsible for ESA-hyporesponsiveness in dialyzed patients.]

Hypertension and nephrology

[Chronic kidney disease and atherosclerosis]


[Accelerated cardiovascular disease is a frequent complication of chronic kidney disease. Chronic kidney disease promotes hypertension and dyslipidaemia, which in turn can contribute to the progression of renal failure. Diabetic nephropathy is a leading cause of renal failure. Hypertension, dyslipidaemia and diabetes together are the major risk factors of the development of endothelial dysfunction and progression of atherosclerosis. Inflammatory mediators are often elevated and the renin-angiotensin system is frequently activated in chronic kidney disease. Promoters of calcification are increased and inhibitors are reduced, which favors vascular calcification, an important cause of vascular injury associated with end-stage renal disease. Accelerated atherosclerosis will then lead to increased prevalence of coronary artery disease, heart failure, stroke and peripheral arterial disease.]

Hypertension and nephrology

[The significance of depressive disorders in patients with chronic kidney diseases]

ZALAI Dóra Márta, SZEIFERT Lilla, NOVÁK Márta

[In this article a practice-oriented narrative review of the depressive disorders in chronic kidney disease is provided. Depressive disorders affect approximately one fourth of the chronic kidney disease population. These mental disorders interfere with physical, cognitive and social functioning and are associated with poor prognosis of patients with chronic kidney disease. Bio-psycho-social factors, including immuno-inflammatory processes, disturbance in glucose- insulin homeostasis, sleep disorders, chronic pain, sexual difficulties, changes in social roles, losses in multiple areas of life and low social support increase the risk for the development of depression. Routine, regular screening of depression in the chronic kidney disease population seems to be warranted. Only limited published evidence is available on the therapeutic possibilities of depression in chronic kidney disease. Preliminary evidence indicates that short, structured psychotherapy may be effective for acute treatment and prevention of psychological distress. Some antidepressants can be applied without the need for dose adjustments. On the other hand, some of the psychotropic medications require dose reduction or should be avoided.]

Hypertension and nephrology

[Predictive factors for ischemic heart disease, diabetes mellitus and chronic kidney disease among hypertensive patients based on the data of the Hungarian Hypertension Registry 2011-2013-2015. Part I. Hypertensive population aged 35 to 64 years]

KÉKES Ede, PAKSY András, SZEGEDI János, JÁRAI Zoltán

[The association of hypertension with ischemic heart disease, diabetes and chronic kidney disease is the greatest therapeutic challenge because these associations significantly increase mortality and deteriorate life expectancy. It is important for the clinician to clarify the predictive factors of each association for successful prevention or slowing the progression of diseases. According to the database of the Hungarian Hypertension Registry 2011-2013-2015, 11,137 men and 11,112 women with hypertension and comorbidities (CHD, diabetes, CKD) aged between 35 and 64 were analyzed for the purpose of assessing the predictive value of the traditional risk factors in co-morbidity. We analyzed the predictive weight of each variable with single- and multi-variable stepwise logistic regression, and reported Odds ratio (OR, odds ratio). In patients with hypertension aged 35-64 (male / female), the prevalence of CHD was 41.6% / 35.8%, diabetes 27.1% / 23% and KVB 16.2% / 33.8%, respectively. The chance of developing CHD is highest in hypertensive individuals (male/female) who have diabetes (OR 1.30/1.48), who are obese (OR 1.22/1.21), who smoke (OR 1.50/1.51), and whose blood pressure >140/90 mmHg (OR 1.23/1.29). The dominant predictive factors of type 2 diabetes are obesity (visceral obesity) (OR 1.46/1.49), low HDL cholesterol (OR 1.32/1.35), and high triglyceride levels (OR 1.20/1.42); in women the uric acid level also showed high odds ratio (OR 1.39). There is a significant chance of developing chronic kidney disease in hypertension in both sexes, if abnormal uric acid levels (OR 1.73/1.46) and inadequate treatment of high blood pressure (>140Hgmm SBP) (OR 1.43/1.19) are present. In women, the abnormal triglyceride level) also showed a high odd (OR 1.81).]