Publications by authors named "Maria Eleni Alexandrou"

Article Synopsis
  • Sodium-glucose co-transporter-2 inhibitors (SGLT2is) were found to significantly lower cardiovascular and all-cause mortality in people with chronic kidney disease (CKD) based on a systematic review of 11 studies involving over 83,000 participants.
  • These medications reduced the risk of cardiovascular death by 14%, all-cause death by 15%, and major adverse cardiac events (MACE) by 13%, showing consistent effects across different levels of kidney function and risk categories.
  • The findings suggest that SGLT2is could be beneficial for CKD patients, regardless of their baseline kidney function or cardiovascular risk level, highlighting their potential in improving health outcomes in this population.
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Article Synopsis
  • - The study focused on assessing changes in right ventricular (RV) function in hemodialysis patients based on fluid buildup measured by interdialytic-weight-gain (IDWG%) between sessions.
  • - Researchers analyzed data from 41 patients, categorizing them into high (>4.5%) and low (<4.5%) IDWG% groups, and performed echocardiograms at the beginning and end of 3-day and 2-day periods.
  • - Results indicated that patients with higher IDWG% experienced significantly greater increases in RV systolic pressure (RVSP) during the 3-day interval, highlighting the impact of excess fluid on pulmonary circulation.
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  • - A meta-analysis was conducted to evaluate the impact of SGLT-2 inhibitors on heart failure (HF) events in chronic kidney disease (CKD) patients, revealing a 32% reduction in the risk of HF events compared to placebo.
  • - The analysis included 12 randomized controlled trials with a total of 89,191 participants, showing that the effect of SGLT-2 inhibitors was more pronounced in patients with lower kidney function (eGFR <60 ml/min/1.73 m²).
  • - The findings suggest that SGLT-2 inhibitors could play a significant role in preventing HF events in advanced CKD patients, potentially changing treatment approaches.
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  • A randomized trial compared the effects of standard percutaneous nephrolithotomy (sPCNL), mini-PCNL, and retrograde intrarenal surgery (RIRS) on renal injury biomarkers in patients with nephrolithiasis (kidney stones).
  • The study involved 75 patients and measured levels of specific kidney injury biomarkers (NGAL, KIM-1, IL-18) at various time points before and after surgery, finding no significant differences between the surgical methods.
  • Results indicated that while all procedures increased biomarker levels post-surgery, these increases were similar across all groups, suggesting that the type of endourological procedure does not significantly affect renal damage.
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Chronic kidney disease (CKD) in individuals with type 2 diabetes (T2D) represents a major public health issue; it develops in about 30%-40% of patients with diabetes mellitus and is the most common cause of CKD worldwide. Patients with CKD and T2D are at high risk of both developing kidney failure and of cardiovascular events. Renin-angiotensin system (RAS) blockers were considered the cornerstone of treatment of albuminuric CKD in T2D for more than 20 years.

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Circulating microvesicles (MVs) have been studied in heterogeneous, divergent, and rather small patient populations with cardiovascular risk . Therefore, we measured endothelial (EMVs), platelet (PMVs) and erythrocyte (RMVs) MVs in patients with divergent cardiovascular risk. We then compared them to coronary artery disease (CAD) and healthy subjects and identified independent MVs' predictors.

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We report a case of a 58-year-old woman presenting with symptoms of oliguria, fatigue, anorexia, constipation, hypovolemic signs, and laboratory tests showing severe hypokalemia (1.7 mEq/L), hyponatremia (120 mEq/L), high serum creatinine (SCr, 6.46 mg/dL) and urea (352 mg/dL).

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Introduction: Kidney transplantation (KTx) is associated with improved blood pressure (BP) levels for kidney transplant recipients (KTRs) without evoking significant changes in donors. However, there is a paucity of studies offering simultaneous detailed evaluation of BP profiles over time in transplant donor-recipient pairs. The aim of the present study was the parallel evaluation of ambulatory BP levels and trajectories in KTRs and their respective living kidney donors in the short and mid-term following KTx.

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Background: Patients with kidney failure often present with reduced cardiovascular reserve. Kidney transplantation (KT) is the optimal treatment for patients with end-stage kidney disease as it is associated with longer survival and improved quality of life compared to dialysis.

Methods: This is a systematic review and meta-analysis of studies using cardiopulmonary-exercise-testing to examine the cardiorespiratory fitness of patients with kidney failure before and after KT.

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Rationale & Objective: Previous studies in chronic kidney disease (CKD) showed that vascular dysfunction in different circulatory beds progressively deteriorates with worsening CKD severity. This study evaluated muscle oxygenation and microvascular reactivity at rest, during an occlusion-reperfusion maneuver, and during exercise in patients with different stages of CKD versus controls.

Study Design: Observational controlled study.

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Introduction: Cardiac arrhythmias are the most common cause of death in hemodialysis. Autonomic dysfunction plays a central role in this arrhythmogenic background. Previous studies on hemodialysis-related changes in heart rate variability (HRV) give contradictory results.

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Objective: Kidney transplant recipients (KTRs) display higher cardiovascular morbidity and mortality than the general population. Increased short-term blood pressure variability (BPV) is associated with a higher risk of adverse cardiovascular outcomes in chronic kidney disease (CKD). The aim of this study is to investigate sex differences in short-term BPV in KTRs.

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Kidney transplantation is considered the treatment of choice for end-stage kidney disease patients. However, the residual cardiovascular risk remains significantly higher in kidney transplant recipients (KTRs) than in the general population. Hypertension is highly prevalent in KTRs and represents a major modifiable risk factor associated with adverse cardiovascular outcomes and reduced patient and graft survival.

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Purpose: In contrast to peridialytic blood pressure (BP), intradialytic and home BP measurements are accurate metrics of ambulatory BP load in hemodialysis patients. This study assessed the agreement of peridialytic, intradialytic, and scheduled interdialytic recordings with 44-h BP in a distinct hemodialysis population, patients with intradialytic hypertension (IDH).

Methods: This study included 45 IDH patients with valid 48-h ABPM and 197 without IDH.

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Background: Increased arterial stiffness is suggested to be involved in the pathogenesis of intradialytic-hypertension (IDH). Ambulatory pulse-wave-velocity (PWV) is an independent predictor for all-cause-mortality in haemodialysis and its prognostic power is better than office PWV. This is the first study examining ambulatory central blood pressure (BP) and arterial stiffness parameters in patients with and without IDH.

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In this case, we report a 64-year-old man presenting with anorexia, nausea and vomiting, mild abdominal pain, and oligoanuria for a few hours. His previous medical history included diabetes, hypertension, and chronic kidney disease (CKD) stage 3. Upon arrival, laboratory results revealed stage III acute kidney injury (AKI) with hyperkalemia requiring dialysis treatment.

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Increased blood pressure variability (BPV) is strongly associated with cardiovascular events in end-stage kidney disease patients. Male hemodialysis patients present higher cardiovascular risk compared with females. The aim of this study is to investigate sex differences in short-term BPV in hemodialysis patients.

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Background: Hypertension is a major cardiovascular risk factor in both kidney transplant recipients (KTRs) and patients with chronic kidney disease (CKD). Ambulatory blood pressure monitoring (ABPM) is considered the gold-standard method for hypertension management in these subjects. This is the first study evaluating the full ambulatory blood pressure (BP) profile and short-term BP variability (BPV) in KTRs versus CKD patients without kidney replacement therapy.

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Background And Aims: Ambulatory blood pressure (BP) control is worse in men than women with chronic kidney disease or kidney transplantation. So far, no study investigated possible sex differences in the prevalence, control, and phenotypes of BP according to predialysis and 48-h ambulatory blood pressure monitoring (ABPM) in hemodialysis patients. Further, no study has evaluated the diagnostic accuracy of predialysis BP in male and female hemodialysis patients.

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This is the first report in an adolescent of minimal change disease (MCD) after the first injection of the BNT162b2 COVID-19 vaccine (Pfizer-BioNTech) with complete remission following steroid treatment. An 18-year-old white male with no prior medical history complained of gastrointestinal symptoms 11 days after his vaccination. Ascites and lower extremity edema were observed a few days later.

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Background: Hypertension is the most prevalent cardiovascular risk factor in kidney transplant recipients (KTRs). Preliminary data suggest similar ambulatory blood pressure (BP) levels in KTRs and haemodialysis (HD) patients. This is the first study comparing the full ambulatory BP profile and short-term BP variability (BPV) in KTRs versus HD patients.

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Article Synopsis
  • Hypertension and chronic kidney disease (CKD) are common conditions that significantly increase the risk of severe COVID-19 outcomes.
  • Early in the pandemic, there were concerns that RAS blockers, used for treating these conditions, could worsen COVID-19 severity by raising levels of ACE2, the receptor for the virus.
  • However, recent human studies have shown no evidence supporting the idea that RAS blocker use is linked to increased susceptibility or worse outcomes in COVID-19 patients with hypertension or CKD.
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As our therapeutic armamentarium for HFpEF is insufficient, research has been focusing on the potential beneficial effect of existing pharmaceutical regimens on this specific patient population. A series of RCTs have recently examined the impact of various pharmaceutical treatments with proven benefit in HFrEF, on the improvement of symptoms of HFpEF patients. This systematic review and meta-analysis comprised studies of adult patients with HFpEF and evaluated the impact of different cardiovascular acting medication on cardiorespiratory fitness, reflected by peak VO values measured during CPET.

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Background: Volume overload is the main mechanism of BP elevation in end-stage kidney disease (ESKD) patients undergoing hemodialysis or peritoneal dialysis and has been linked to adverse outcomes and increased mortality in this population.

Summary: This review discusses current knowledge on lung ultrasound as a tool for detection of extracellular volume overload through evaluation of extravascular lung water content. We describe the principles of lung US, the main protocols to apply it in clinical practice, and accumulated data evidence regarding its associations with cardiovascular events and mortality.

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Background: Ambulatory-BP-monitoring (ABPM) is recommended for hypertension diagnosis and management in hemodialysis patients due to its strong association with outcomes. Intradialytic and scheduled interdialytic BP recordings show agreement with ambulatory BP. This study assesses in parallel the association of pre-dialysis, intradialytic, scheduled interdialytic and ambulatory BP recordings with cardiovascular events.

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