Publications by authors named "DOBREV D"

Despite significant advances in its management, AF remains a major healthcare burden affecting millions of individuals. Rhythm control with antiarrhythmic drugs or catheter ablation has been shown to improve symptoms and outcomes in AF patients, but current treatment options have limited efficacy and/or significant side-effects. Novel mechanism-based approaches could potentially be more effective, enabling improved therapeutic strategies for managing AF.

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  • Impaired calcium (Ca) handling in heart cells is a key feature of heart failure (HF), leading to issues like weakened heart contractions and irregular heartbeats.
  • The study used transgenic mice with a mutation affecting a calcium regulator (phospholamban) to understand how defects in calcium cycling contribute to HF, noting that these mice experience severe and fast-progressing heart failure.
  • Early treatment aimed at correcting calcium cycling using Raf kinase inhibitor protein (RKIP) was found to delay heart cell damage and improve overall health of the mice, indicating that addressing Ca dynamics early on could be crucial for preventing further complications in heart failure.
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Objectives: This review aims to examine the evidence on the benefits and risks of lipid lowering drugs in patients with liver disease. Elevated liver enzyme levels often lead to cautious discontinuation of these drugs, potentially withholding from patients their benefit in reducing cardiovascular disease morbidity and mortality.

Methods And Results: Using a literature search of PubMed, we examine the efficacy and safety profiles of various lipid lowering agents, including statins, ezetimibe, bempedoic acid, PCSK9 inhibitors, fibrates, and icosapent ethyl, focusing particularly on their potential side effects related to liver health.

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Background: Pulmonary vein isolation (PVI) using pulsed field ablation (PFA) or cryoballoon ablation (CBA) are commonly used single-shot techniques for the treatment of patients with atrial fibrillation (AF). The number of overweight (BMI 25-30 kg/m) and obese (BMI>30 kg/m) patients undergoing PVI is increasing, but data on this patient population is limited.

Methods: Consecutive AF patients with a BMI ≥25 kg/m undergoing PFA- or CBA-PVI were included in this retrospective analysis.

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  • This study investigates sex-based differences in atrial fibrillation (AF) by examining calcium handling and arrhythmogenic events in male and female heart cells.
  • The research finds that female atrial cardiomyocytes show more frequent calcium sparks and are more prone to spontaneous calcium releases compared to males, shedding light on the mechanisms behind these differences.
  • Potential interventions, such as restoring t-tubules and inhibiting certain calcium handling proteins, may help reduce arrhythmogenic events, with combination therapies showing increased effectiveness, particularly in females.
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  • The study examined the effectiveness of using intermittent direct oral anticoagulants (DOACs) based on real-time heart rhythm monitoring in high-bleeding risk patients with symptomatic paroxysmal atrial fibrillation (AF) post-percutaneous coronary intervention (PCI).
  • Conducted over three years in eight Italian centers, the study involved 240 patients, where those without AF episodes 30 days after PCI could stop DOACs, while those with significant AF episodes would resume treatment for 30 days.
  • Results showed a significant reduction in the duration of anticoagulation for the intermittent group, with a 40-46% decrease compared to continuous treatment, while bleeding and ischemic events did not differ significantly between groups.
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Thrombin supports coagulation-independent inflammation via protease-activated receptors (PAR). PAR4 is specifically increased in obese human atria, correlating with NLRP3 inflammasome activation. PAR4-mediated NLRP3 inflammasome activation in atrial cardiomyocytes is not known, nor have signaling partners been identified.

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Background: Heart failure (HF) and inflammation have a bidirectional relation leading to activation and adaptation of multiple cellular lines, including leucocyte subtypes and platelets. We aimed to assess and compare the predictive value of the neutrophil-lymphocyte (NLR), monocyte-lymphocyte (MLR) and platelet-lymphocyte (PLR) ratios for all-cause long-term mortality in HF.

Methods: This is an observational retrospective cohort study that included patients from the HI-HF cohort that survived the initial hospitalization.

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  • Atypical atrial flutter (AAF) is a complex heart rhythm issue, and managing patients can be difficult, especially when mapping isn’t possible during the arrhythmia.
  • A study analyzed 97 ablation procedures from 76 patients, finding no significant difference in procedure success whether AAF was ongoing or induced at the start.
  • However, the recurrence of any arrhythmia was higher after ablation of ongoing AAF compared to induced AAF, suggesting inducing AAF may be a valid approach for better long-term outcomes.
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Obesity and underweight are a growing health problem worldwide and a challenge for clinicians concerning antithrombotic therapy, due to the associated risks of thrombosis and/or bleeding. This clinical consensus statement updates a previous one published in 2018, by reviewing the most recent evidence on antithrombotic drugs based on body size categories according to the World Health Organization classification. The document focuses mostly on individuals at the extremes of body weight, i.

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Dyslipidaemia is a common chronic kidney disease (CKD) and contributes to excessively elevated cardiovascular mortality. The pathophysiology is complex and modified by comorbidities like the presence/absence of proteinuria, diabetes mellitus or drug treatment. This paper provides an overview of currently available treatment options.

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Aims: The concept of "atrial cardiomyopathy" (AtCM) had been percolating through the literature since its first mention in 1972. Since then, publications using the term were sporadic until the decision was made to convene an expert working group with representation from four multinational arrhythmia organizations to prepare a consensus document on atrial cardiomyopathy in 2016 (EHRA/HRS/APHRS/SOLAECE expert consensus on atrial cardiomyopathies: definition, characterization, and clinical implication). Subsequently, publications on AtCM have increased progressively.

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  • The study investigates the effects of red blood cell (RBC) transfusion on short-term mortality in patients undergoing transapical transcatheter aortic valve implantation (TA-TAVI), where bleeding is common.
  • Out of 11,265 TAVI participants, 548 had TA-TAVI, with 209 receiving RBC transfusions, and the study found a significant association between transfusion and increased 30-day mortality.
  • The research concluded that RBC transfusion independently predicts higher short-term mortality in TA-TAVI patients, regardless of other factors like major bleeding and kidney injury.
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Bentonite is an integral part of the engineered barrier system (EBS) in deep geological repositories (DGR) for nuclear waste, but its indigenous microorganisms may jeopardize long-term EBS integrity. To predict microbial activity in DGRs, it is essential to understand microbial reactions to the early hot phase of DGR evolution. Two bentonites (BCV and MX-80) with varied bentonite/water ratios and saturation levels (compacted to 1600 kg.

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Inflammatory signalling via the nod-like receptor (NLR) family pyrin domain-containing protein-3 (NLRP3) inflammasome has recently been implicated in the pathophysiology of atrial fibrillation (AF). However, the precise role of the NLRP3 inflammasome in various cardiac cell types is poorly understood. Targeting components or products of the inflammasome and preventing their proinflammatory consequences may constitute novel therapeutic treatment strategies for AF.

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