Publications by authors named "Kimon Stamatelopoulos"

Objective: High-intensity resistance exercise may temporarily induce vascular dysfunction mediated by pro-oxidant and pro-inflammatory pathways. In the present study, we aimed to evaluate the possible protective effect of the antioxidant N-acetyl cysteine (NAC) on vascular function after a bout of high-intensity resistance exercise.

Methods: In this randomized, crossover, placebo-controlled study, ten healthy male volunteers (mean age 24.

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Arterial hypertension (AH) and familial hypercholesterolemia (FH) are major risk factors for atherosclerotic cardiovascular disease (ASCVD). The extent to which the coexistence of AH and FH amplifies the ASCVD risk is not well known. We aimed to explore the effect of AH on the prevalence of ASCVD in patients with FH.

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Atherosclerosis is the main underlying cause of cardiovascular diseases. Its prevention is based on the detection and treatment of traditional cardiovascular risk factors. However, individuals at risk for early vascular disease often remain unidentified.

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Cardiovascular diseases remain the leading cause of global morbidity and mortality. Validated risk scores are the basis of guideline-recommended care, but most scores lack the capacity to integrate complex and multidimensional data. Limitations inherent to traditional risk prediction models and the growing burden of residual cardiovascular risk highlight the need for refined strategies that go beyond conventional paradigms.

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Background: Recent evidence suggests that Alzheimer's amyloid-beta (1-40) (Αβ1-40), an emerging biomarker of cardiovascular disease, may be involved in the heart-brain-renal axis. We aimed to comprehensively explore the association between circulating Aβ1-40 levels and renal function and its clinical relevance.

Methods: Consecutively recruited subjects in the Athens Angiometabolic Registry with measured Aβ1-40 plasma levels (n = 811) were analysed.

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Ageing of the cardiovascular system is associated with frailty and various life-threatening diseases. As global populations grow older, age-related conditions increasingly determine healthspan and lifespan. The circulatory system not only supplies nutrients and oxygen to all tissues of the human body and removes by-products but also builds the largest interorgan communication network, thereby serving as a gatekeeper for healthy ageing.

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Epidemiological evidence suggests the presence of common risk factors for the development and prognosis of both cardio- and cerebrovascular diseases, including stroke, Alzheimer's disease, vascular dementia, heart, and peripheral vascular diseases. Accumulation of harmful blood signals may induce organotypic endothelial dysfunction affecting blood-brain barrier function and vascular health in age-related diseases. Genetic-, age-, lifestyle- or cardiovascular therapy-associated imbalance of amyloid-beta (Aβ) peptide metabolism in the brain and periphery may be the missing link between age-related neurocardiovascular diseases.

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Article Synopsis
  • The study investigates whether carotid-to-femoral pulse wave velocity (PWV), a measure of arterial stiffness, can predict cardiovascular risks beyond the SCORE2 risk score in individuals without existing atheromatosis.
  • Over a 6-year follow-up of 747 participants, results show that higher PWV is an independent predictor of first cardiovascular events (like strokes and heart attacks) and enhances the predictive power of SCORE2.
  • The findings suggest that including PWV in risk assessments may significantly improve the identification of individuals at risk for major adverse cardiovascular events (MACE), validating its importance in cardiovascular health monitoring.
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Background & Aims: The effect of lipid-lowering treatment (LLT) on metabolic dysfunction associated steatotic liver disease (MASLD) is unclear. This is relevant for patients with familial hypercholesterolemia (FH) who are on lifelong LLT. We aimed to evaluate the effect of LLT on MASLD indices in this population.

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Context: Nonalcoholic fatty liver disease (NAFLD) with advanced liver fibrosis is associated with cardiovascular disease (CVD).

Objective: This work aimed to examine if markers of vascular injury mediate the link between liver fibrosis noninvasive tests (LFNITs) and CVD events, and to compare the incremental predictive value of LFNITs over established CVD risk scores.

Methods: Consecutively recruited individuals (n = 1692) with or without clinically overt coronary artery disease (CAD) from the Athens Cardiometabolic Cohort, were analyzed.

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Article Synopsis
  • Cardiogenic shock (CS) is a major cause of in-hospital deaths after acute coronary syndromes (ACS), with nearly 50% mortality, highlighting the need for personalized risk prediction.
  • The ORBI score, designed to predict in-hospital CS in ACS patients undergoing percutaneous coronary intervention (PCI), has shown varying effectiveness between genders, necessitating improved risk assessment methods.
  • A new score called SEX-SHOCK was developed, incorporating key health indicators, and demonstrated better predictive ability for both sexes compared to the ORBI score, thus advancing risk prediction strategies in ACS management.
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  • Cardiac amyloidosis involves the buildup of amyloid proteins in the heart, affecting its functioning and the prognosis of patients, with biomarkers being crucial for assessment.
  • Treatment options are limited as traditional heart failure therapies are often ineffective, highlighting the need for targeted strategies to manage amyloid deposition.
  • The mechanisms behind organ damage in cardiac amyloidosis are complex and involve factors like oxidative stress and inflammation, which are being investigated for potential therapeutic strategies.
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Circulating amyloid-beta 1-40 (Αb40) has pro-atherogenic properties and could serve as a biomarker in atherosclerotic cardiovascular disease (ASCVD). However, the association of Ab40 levels with morphological characteristics reflecting atherosclerotic plaque echolucency and composition is not available. Carotid atherosclerosis was assessed in consecutively recruited individuals without ASCVD (n = 342) by ultrasonography.

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  • * This study analyzed the effects of Chios mastic on miR-21 levels in 57 hypertensive patients participating in a clinical trial with different doses and a placebo group.
  • * Results showed significant changes in miR-21 levels linked to blood pressure measurements, indicating that miR-21 might play a role in how Chios mastic influences nighttime blood pressure in patients.
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Inflammatory responses in small vessels play an important role in the development of cardiovascular diseases, including hypertension, stroke, and small vessel disease. This involves various complex molecular processes including oxidative stress, inflammasome activation, immune-mediated responses, and protein misfolding, which together contribute to microvascular damage. In addition, epigenetic factors, including DNA methylation, histone modifications, and microRNAs influence vascular inflammation and injury.

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Article Synopsis
  • Familial hypercholesterolemia (FH) significantly increases the risk of atherosclerotic cardiovascular disease (ASCVD), with older patients (over 65) experiencing more ASCVD risk factors, such as hypertension and type 2 diabetes, compared to younger patients.
  • In a study of 2,273 adults, elderly FH patients showed a higher prevalence of established ASCVD (38.4%) and coronary artery disease (CAD) compared to their younger counterparts, even when adjusted for other risk factors.
  • Although elderly patients received more intense lipid-lowering treatments with lower post-treatment LDL-C levels, both elderly and younger groups had similarly low rates of achieving LDL-C targets, highlighting the need for improved early
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Background: In this study we used Mendelian randomization (MR) to investigate the potential causal association of lipoprotein (a) [Lp(a)] levels with pulse wave velocity (PWV).

Methods: Genetic variants associated with Lp(a) were retrieved from the UK Biobank GWAS (N = 290,497). A non- overlapping GWAS based on a European cohort (N = 7,000) was used to obtain genetic associations with PWV (outcome) and utilized two different measures for the same trait, brachial-ankle (baPWV) and carotid-femoral (cfPWV) PWV.

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Aims: Complete haematologic response to treatment for light chain cardiac amyloidosis (AL-CA) may lead to improvement of myocardial function and better outcomes. We sought to evaluate the effect of response to treatment for AL-CA on echocardiographic indices of myocardial deformation and work and their prognostic significance.

Methods And Results: Sixty-one patients treated for AL were enrolled and underwent echocardiographic assessment at baseline and at 1 year.

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Background: Female sexual dysfunction (FSD) has been suggested to be correlated with the burden of cardiovascular risk factors.

Aim: We aimed to evaluate the possible association between functional indices of vascular function and FSD scores in apparently healthy postmenopausal women.

Methods: This cross-sectional study included 116 postmenopausal women who underwent assessment of endothelial function with measurement of flow-mediated dilation (FMD) of the branchial artery and arterial stiffness estimation with measurement of the carotid-femoral pulse wave velocity (PWV).

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Background: Clinical characteristics and outcomes of patients with transthyretin amyloidosis cardiomyopathy (ATTR-CM) vary by region, necessitating the acquisition of country-specific evidence for proper management.

Methods: This is an observational study including sequential patients presenting in the Amyloidosis Reference Center of Greece, from 01/2014 to 12/2022. ATTR-CM was diagnosed by positive scintigraphy and exclusion of light-chain amyloidosis or positive biopsy typing.

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Importance: The Global Registry of Acute Coronary Events (GRACE) risk score, a guideline-recommended risk stratification tool for patients presenting with acute coronary syndromes (ACS), does not consider the extent of myocardial injury.

Objective: To assess the incremental predictive value of a modified GRACE score incorporating high-sensitivity cardiac troponin (hs-cTn) T at presentation, a surrogate of the extent of myocardial injury.

Design, Setting, And Participants: This retrospectively designed longitudinal cohort study examined 3 independent cohorts of 9803 patients with ACS enrolled from September 2009 to December 2017; 2 ACS derivation cohorts (Heidelberg ACS cohort and Newcastle STEMI cohort) and an ACS validation cohort (SPUM-ACS study).

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Background And Aims: Preclinical data suggest that activation of the adaptive immune system is critical for myocardial repair processes in acute myocardial infarction. The aim of the present study was to determine the clinical value of baseline effector T cell chemokine IP-10 blood levels in the acute phase of ST-segment elevation myocardial infarction (STEMI) for the prediction of the left ventricular function changes and cardiovascular outcomes after STEMI.

Methods: Serum IP-10 levels were retrospectively quantified in two independent cohorts of STEMI patients undergoing primary percutaneous coronary intervention.

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Article Synopsis
  • Microcirculation plays a crucial role in regulating organ function and is significantly affected by environmental stressors, leading to aging and related diseases.
  • Dysfunction in microvascular systems can accumulate health issues and increase the risk of cardiovascular problems, largely due to microvascular inflammation.
  • The paper emphasizes the need for more research to identify specific molecular targets for early intervention in chronic age-related diseases, highlighting the importance of understanding microvascular inflammation in contemporary healthcare.
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Purpose: Cardiovascular disease is commonly accompanied by renal dysfunction. Multimorbidity in hospitalized patients impacts unfavorably on prognosis and hospital stay. We aimed to illustrate the contemporary burden of cardiorenal morbidity across inpatient cardiology care in Greece.

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