Publications by authors named "Kostas Siamopoulos"

Chronic pain is a common concern and is considered to be one of the major problems in patients with chronic physical disorders. We studied the effect of pain in patients with hypertension with or without chronic kidney disease (CKD) and the association between pain and symptoms of depression. The study involved 158 hypertensive individuals (59.

View Article and Find Full Text PDF

Lung congestion is a risk factor for all-cause and cardiovascular mortality in patients on chronic hemodialysis, and its estimation by ultrasound may be useful to guide ultrafiltration and drug therapy in this population. In an international, multi-center randomized controlled trial (NCT02310061) we investigated whether a lung ultrasound-guided treatment strategy improved a composite end point (all-cause death, non-fatal myocardial infarction, decompensated heart failure) vs usual care in patients receiving chronic hemodialysis with high cardiovascular risk. Patient-Reported Outcomes (Depression and the Standard Form 36 Quality of Life Questionnaire, SF36) were assessed as secondary outcomes.

View Article and Find Full Text PDF

Background: Uncontrolled hypertension notwithstanding the use of at least three drugs or hypertension controlled with at least four drugs, the widely accepted definition of treatment-resistant hypertension (TRH), is considered as a common problem in the hemodialysis population. However, to date there is no estimate of the prevalence of this condition in hemodialysis patients.

Method: We estimated the prevalence of TRH by 44-h ambulatory BP monitoring (ABPM) in 506 hemodialysis patients in 10 renal units in Europe included in the registry of the European Renal and Cardiovascular Medicine (EURECAm,), a working group of the European Association, European Dialysis and Transplantation Association (ERA EDTA).

View Article and Find Full Text PDF

Introduction: Since inflammation alters vascular permeability, including vascular permeability in the lung, we hypothesized that it can be an amplifier of lung congestion in a category of patients at high risk for pulmonary oedema like end stage kidney disease (ESKD) patients.

Objective And Methods: We investigated the effect modification by systemic inflammation (serum CRP) on the relationship between a surrogate of the filling pressure of the LV [left atrial volume indexed to the body surface area (LAVI)] and lung water in a series of 220 ESKD patients. Lung water was quantified by the number of ultrasound B lines (US-B) on lung US.

View Article and Find Full Text PDF

The purpose of the present study was to investigate the burden and depression in spouses of patients with chronic kidney disease (CKD). The interrelation between burden and depression in family caregivers has been pointed out by previous researches in several chronic diseases and researchers agree that they clearly go together and one cannot talk about one without considering the other. More particularly, in the present study, the caregiver burden, the depression, anxiety, and also health-related quality of life and demographic factors of spouses of patients with CKD were examined, using self-report questionnaires.

View Article and Find Full Text PDF

Objective: Obesity and renal disease are both associated with low serum 25(OH)D. The aims of the present study were to (a) assess vitamin D status and compare serum vitamin D levels in overweight/obese versus normal-weight individuals according to eGFR and (b) assess the role of 25(OH)D in the development of secondary hyperparathyroidism (SHPT).

Design: Serum 25(OH)D, 1,25(OH)D, parathyroid hormone (PTH), calcium, and phosphate were measured in 104 subjects with BMI > 25 kg/m.

View Article and Find Full Text PDF

Background: Natural history, predisposing factors to an unfavourable outcome and the effect of various therapeutic regimens were evaluated in a cohort of 457 patients with immunoglobulin A nephropathy (IgAN) and follow-up of at least 12 months.

Methods: Patients with normal renal function and proteinuria <1 g/24 h as well as those with serum creatinine (SCr) >2.5 mg/dL and/or severe glomerulosclerosis received no treatment.

View Article and Find Full Text PDF

Background And Objectives: Accumulation of fluid in the lung is the most concerning sequela of volume expansion in patients with ESRD. Lung auscultation is recommended to detect and monitor pulmonary congestion, but its reliability in ESRD is unknown.

Design, Setting, Participants, & Measurements: In a subproject of the ongoing Lung Water by Ultra-Sound Guided Treatment to Prevent Death and Cardiovascular Complications in High Risk ESRD Patients with Cardiomyopathy Trial, we compared a lung ultrasound-guided ultrafiltration prescription policy versus standard care in high-risk patients on hemodialysis.

View Article and Find Full Text PDF

Kidney transplantation is the treatment of choice for a significant number of patients with end-stage renal disease. Although immunosuppression therapy improves graft and patient's survival, it is a major risk factor for infection following kidney transplantation altering clinical manifestations of the infectious diseases and complicating both the diagnosis and management of renal transplant recipients (RTRs). Existing literature is very limited regarding osteomyelitis in RTRs.

View Article and Find Full Text PDF

The Klotho gene displays an extremely shortened life span with loss of function missense mutations leading to premature multiple organ failure, thus resembling human premature aging syndromes. The transmembrane form of Klotho protein functions as an obligatory co-receptor for FGF23. Klotho and FGF23 are crucial components for the regulation of vitamin D metabolism and subsequently blood phosphate levels.

View Article and Find Full Text PDF

Introduction: Within this longitudinal study we investigated the association of inflammation markers C-reactive protein (CRP), interleukin-6 (IL-6) and tumor necrosis factor-α (TNFα) and endothelial dysfunction markers intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1) with left ventricular mass indexed for height(2.71) (LVMI) in hypertensive predialysis CKD patients.

Material And Methods: From 2004 to 2005, 182 incident consecutive adult patients from the outpatient CKD clinics of two hospitals in Greece with CKD and hypertension or using antihypertensive medication, were included.

View Article and Find Full Text PDF

Background: Quality of Life (QoL) is often poor in people undergoing dialysis and this sometimes contributes to the high rate of morbidity and mortality. The aim of our study is to assess the QoL of patients on haemodialysis in Greece and discuss the socio-demographic factors that affect QoL in this period of financial crisis.

Design/patients: Patients with CKD not on dialysis, plus those undergoing Haemodialysis (HD) and Peritoneal Dialysis (PD) were invited to complete the SF-36 questionnaire electronically, supervised by a trained nurse.

View Article and Find Full Text PDF

Background: Toll-like receptors (TLRs) are key players in the innate immune system whose activation leads to an inflammatory response. Inflammation plays an important role in the pathogenesis of chronic kidney disease (CKD) and diabetes mellitus. The aim of our study was to assess the proinflammatory state of nondialysis CKD patients by evaluating the membrane expression of TLR2 and TLR4 and the intracellular IL-1β and IL-6 production in response to the ligand Pam3Cys-Ser-(Lys)4 (Pam3CSK4).

View Article and Find Full Text PDF

Background: Chronic Kidney Disease (CKD) is a relatively common condition not only associated with increased morbidity and mortality but also fuelling End Stage Renal Disease (ESRD). Among developed nations, Greece has one of the highest ESRD incidence rates, yet there is limited understanding of the epidemiology of earlier stages of CKD.

Methods: Cross-sectional survey of pre-dialysis CKD outpatients in nephrology clinics in the National Health Care system between October 2009 and October 2010.

View Article and Find Full Text PDF

Objective: It has been suggested that aliskiren has a long half-life and maintains a blood pressure (BP)-lowering effect following a missed dose. We tested the hypothesis that every other day (eod) administration of aliskiren has the same effects as the once daily (od) dosing in albuminuric hypertensive patients.

Methods: Fifteen hypertensive patients, after a 4-week wash-out period on clonidine, received 300 mg aliskiren od as the sole treatment.

View Article and Find Full Text PDF

The first renal disease described from Hippocrates is nephrolithiasis with renal colic, which is the pain of stone passage and is also a common renal problem with easily recognizable characteristics. There has been much written about dietary factors, which have unequivocally been proved to play an important role in the formation of kidney stones. In this regard, it is of interest that the contribution of factors such as stressful events, life style, or occupation in the formation of kidney stones has not been well studied.

View Article and Find Full Text PDF

Encapsulating peritoneal sclerosis (EPS) is a rare but serious complication of peritoneal dialysis (PD), characterized by extensive intraperitoneal fibrosis and encasement of bowel loops. It typically associates with long-term PD and progressive loss of ultrafiltration. The management of EPS has evolved substantially from the original report of this entity and now includes immunosuppressive agents, antifibrotic agents, nutritional support, and surgical intervention.

View Article and Find Full Text PDF

Background: This study aimed to investigate the association of both body mass index (BMI) and waist circumference (WC) with left ventricular mass (LVM) in hypertensive predialysis chronic kidney disease (CKD) patients.

Methods: From 2004 to 2005, 206 consecutive incident adult patients from the outpatient CKD clinics of two hospitals in Greece were included. Inclusion criteria were the presence of CKD and hypertension.

View Article and Find Full Text PDF

Background: Posterior reversible encephalopathy syndrome (PRES) is a clinico-radiologic entity characterized by headache, visual disturbances, seizures, and the presence of edema on MRI scan, predominantly in the posterior white matter. Regarding end-stage renal disease (ESRD) and PRES, only a few cases of children on peritoneal dialysis (PD) and adults on hemodialysis have been described in the literature.

Cases: We report 4 cases of adult patients on PD who presented with PRES, all of which were due to hypertension and inadequate management of fluid balance.

View Article and Find Full Text PDF

Purpose: Cognitive dysfunction (CO/DY) in chronic kidney disease (CKD) patients has long been recognized. Hypertension is also associated with CO/DY. The study describes associated factors with CO/DY in CKD patients compared to hypertensive subjects.

View Article and Find Full Text PDF

Renovascular hypertension refers to the rise of arterial pressure due to reduced perfusion of the kidney caused by the stenotic renal artery/ies. The most common cause of stenotic renal artery is atherosclerosis. Atherosclerotic renal stenosis is usually part of a systemic syndrome that involves hypertension, intrinsic renal damage, and cardiovascular morbidity.

View Article and Find Full Text PDF

Background/aim: Increased apoptosis along with enhanced inflammation has been reported in hemodialysis and pre-dialysis patients. However, there is limited information at which stage during the progression of chronic kidney disease (CKD) the balance between pro- and anti-apoptotic mechanisms is disturbed and inflammatory response is activated. The aim of this study was to investigate possible alterations in apoptotic and inflammatory markers during CKD (stages 1-4) progression and the probable interactions between them.

View Article and Find Full Text PDF

The sympathetic nervous system has a profound effect on the kidney's ability to regulate blood pressure and, vice versa, the kidney has an important effect on the overall sympathetic tone. As a result, renal sympathetic nerves are crucial for initiation and the maintenance of systemic hypertension. It is fairly well established that efferent renal sympathetic nerve activity contributes significantly to homeostatic regulation of renal blood flow, glomerular filtration rate, renal tubular epithelial cell solute and water transport, and hormonal release.

View Article and Find Full Text PDF