7,054 results match your criteria electrical remodeling

Dietary protein source contributes to the risk of developing maternal syndrome in the Dahl salt-sensitive rat.

Pregnancy Hypertens 2021 May 5;24:126-134. Epub 2021 May 5.

Department of Physiology, Augusta University, United States.

Preeclampsia (PE) is a disorder of pregnancy, which is categorized by hypertension and proteinuria or signs of end-organ damage. Though PE is the leading cause of maternal and fetal morbidity and mortality, the mechanisms leading to PE remain unclear. The present study examined the contribution of dietary protein source (casein versus wheat gluten) to the risk of developing maternal syndrome utilizing two colonies of Dahl salt-sensitive (SS/JrHsdMcwi) rats. Read More

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Myocardial extracellular volume fraction quantitation using cardiac dual-energy CT with late iodine enhancement in patients with heart failure without coronary artery disease: A single-center prospective study.

Eur J Radiol 2021 May 1;140:109743. Epub 2021 May 1.

Department of Radiology, First Affiliated Hospital of Soochow University, Shizi Street No.188, Suzhou, 215002, China; Institute of Medical Imaging, Soochow University, Shizi Street No.188, Suzhou, 215002, China. Electronic address:

Purpose: To evaluate the relationship between myocardial extracellular volume (ECV) fraction measured using dual-energy computed tomography with late iodine enhancement (LIE-DECT) and risk of heart failure (HF) in patients without coronary artery disease (CAD), and to evaluate the relationship between ECV and left ventricular structure and function.

Materials And Methods: Sixty consecutive HF patients without CAD and 60 consecutive participants without heart disease who underwent coronary CT angiography (CCTA) following LIE-DECT were included. ECV of the left ventricle was calculated from the iodine maps and hematocrit levels using the American Heart Association (AHA) 16-segment model. Read More

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Formation of Low Voltage Zones on the Anterior Left Atrial Wall Due to Mechanical Compression by the Ascending Aorta.

J Cardiovasc Electrophysiol 2021 May 9. Epub 2021 May 9.

Division of Cardiology, Department of Medicine, Nihon University School of Medicine, 30-1 Ohyaguchi-kamicho, Itabashi-ku, Tokyo, 173-8610, Japan.

Background: Although low voltage zones (LVZs) in the left atrium (LA) are considered arrhythmogenic substrates in some patients with atrial fibrillation (AF), the pathophysiologic factors responsible for LVZ formations remain unclear.

Objective: To elucidate the anatomical relationship between the LA and ascending aorta responsible for anterior LA wall remodeling.

Methods: We assessed the relationship between existence of LVZs on the anterior LA wall and the 3-dimensional computed tomography image measurements in 102 patients who underwent AF ablation. Read More

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Cannabinoid Receptor Agonist Inhibits Atrial Electrical Remodeling in a Tachypaced Rat Model.

Front Pharmacol 2021 22;12:642398. Epub 2021 Apr 22.

College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada.

Atrial fibrillation (AF) leads to rate-dependent atrial changes collectively defined as atrial remodelling (AR). Shortening of the atrial effective refractory period (AERP) and decreased conduction velocity are among the hallmarks of AR. Pharmacological strategies to inhibit AR, thereby reducing the self-perpetual nature of AF, are of great clinical value. Read More

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Insights into functional mitral regurgitation using transillumination rendering.

Echocardiography 2021 May 8. Epub 2021 May 8.

Division of Cardiology, Mount Sinai Morningside, Mount Sinai Heart, New York, NY, USA.

Secondary mitral regurgitation has been originally explained by tethering of the structurally normal mitral leaflets or by mitral annular dilation after atrial remodeling. Advances in echocardiography have provided more insights into functional anatomy of the mitral valve leaflets as active participants in this entity. Read More

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The Role of Renin-Angiotensin-Aldosterone System in the Heart and Lung: Focus on COVID-19.

Front Pharmacol 2021 20;12:667254. Epub 2021 Apr 20.

Campania Regional Centre for Pharmacovigilance and Pharmacoepidemiology, Naples, Italy.

The renin-angiotensin-aldosterone system (RAAS) firstly considered as a cardiovascular circulating hormonal system, it is now accepted as a local tissue system that works synergistically or independently with the circulating one. Evidence states that tissue RAAS locally generates mediators with regulatory homeostatic functions, thus contributing, at some extent, to organ dysfunction or disease. Specifically, RAAS can be divided into the traditional RAAS pathway (or classic RAAS) mediated by angiotensin II (AII), and the non-classic RAAS pathway mediated by angiotensin 1-7. Read More

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A single injection of periostin decreases cardiac voltage-gated Na channel in rat ventricles.

J Vet Med Sci 2021 Apr 29. Epub 2021 Apr 29.

Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Kitasato University.

Changes in electrophysiological properties, such as ion channel expression and activity, are closely related to arrhythmogenesis during heart failure (HF). However, a causative factor for the electrical remodeling in HF has not been determined. Periostin (POSTN), a matricellular protein, is increased in heart tissues of patients with HF. Read More

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Maternal plasma pro-atrial and C-type natriuretic peptide levels and their associations with cardiovascular and renal function in the second half of normal pregnancy: a longitudinal study.

BMC Pregnancy Childbirth 2021 May 5;21(1):358. Epub 2021 May 5.

Department of Clinical Medicine, Women's Health and Perinatology Research Group, UiT-The Arctic University of Norway, Tromsø, Norway.

Background: Physiological adaptation in pregnancy is characterized by remodeling of endocrine, cardiovascular and renal functions leading to fluid retention, volume expansion, altered cardiac loading conditions and hyperdynamic circulation. Natriuretic peptides have been used as biomarkers of cardiovascular function, but their associations with gestational age-related changes in maternal cardiac, endothelial and renal function have not been elucidated. The aim of this study was to establish longitudinal reference values for maternal plasma atrial natriuretic peptide (proANP) and C-type natriuretic peptide (CNP) and investigate their temporal association with cardiovascular and renal function in the second half of pregnancy. Read More

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Functional genomics meta-analysis to identify gene set enrichment networks in cardiac hypertrophy.

Biol Chem 2021 May 5. Epub 2021 May 5.

Department of Nephropathology, Institute of Pathology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Krankenhausstr. 8-10, D-91054Erlangen, Germany.

In order to take advantage of the continuously increasing number of transcriptome studies, it is important to develop strategies that integrate multiple expression datasets addressing the same biological question to allow a robust analysis. Here, we propose a meta-analysis framework that integrates enriched pathways identified through the Gene Set Enrichment Analysis (GSEA) approach and calculates for each meta-pathway an empirical -value. Validation of our approach on benchmark datasets showed comparable or even better performance than existing methods and an increase in robustness with increasing number of integrated datasets. Read More

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Chronic Thromboembolic Pulmonary Hypertension - What Have We Learned From Large Animal Models.

Front Cardiovasc Med 2021 16;8:574360. Epub 2021 Apr 16.

Department of Cardiology, Erasmus University Medical Center Rotterdam, Rotterdam, Netherlands.

Chronic thrombo-embolic pulmonary hypertension (CTEPH) develops in a subset of patients after acute pulmonary embolism. In CTEPH, pulmonary vascular resistance, which is initially elevated due to the obstructions in the larger pulmonary arteries, is further increased by pulmonary microvascular remodeling. The increased afterload of the right ventricle (RV) leads to RV dilation and hypertrophy. Read More

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Evaluation of left ventricular myocardial mechanics in patients with normally functioning bicuspid aortic valves: A systematic review and meta-analysis.

Echocardiography 2021 Apr 30. Epub 2021 Apr 30.

Department of Cardiovascular Ultrasound, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning Province, China.

Background: Studies have found conflicting results concerning the left ventricular (LV) myocardial deformation properties in patients with normally functioning bicuspid aortic valves (BAVs). Whether the remodeling process of LV occurs independently in patients with BAV is a matter of debate.

Method: We searched PubMed, Embase, Cochrane library, and Web of Science for cohort studies aiming to assess LV function in adults with isolated BAV compared with tricuspid aortic valve (TAV) controls. Read More

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A 3D high resolution MRI method for the visualization of cardiac fibro-fatty infiltrations.

Sci Rep 2021 Apr 29;11(1):9266. Epub 2021 Apr 29.

IHU L'Institut de RYthmologie et de Modélisation Cardiaque (LIRYC), Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, 33600, Pessac-Bordeaux, France.

Modifications of the myocardial architecture can cause abnormal electrical activity of the heart. Fibro-fatty infiltrations have been implicated in various cardiac pathologies associated with arrhythmias and sudden cardiac death, such as arrhythmogenic right ventricular cardiomyopathy (ARVC). Here, we report the development of an MRI protocol to observe these modifications at 9. Read More

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JDP2, a Novel Molecular Key in Heart Failure and Atrial Fibrillation?

Int J Mol Sci 2021 Apr 16;22(8). Epub 2021 Apr 16.

Internal Medicine/Cardiology and Angiology, University Hospital of Giessen and Marburg, 35033 Marburg, Germany.

Heart failure (HF) and atrial fibrillation (AF) are two major life-threatening diseases worldwide. Causes and mechanisms are incompletely understood, yet current therapies are unable to stop disease progression. In this review, we focus on the contribution of the transcriptional modulator, Jun dimerization protein 2 (JDP2), and on HF and AF development. Read More

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Sex Difference in the Risk of Dementia in Patients with Atrial Fibrillation.

Diagnostics (Basel) 2021 Apr 23;11(5). Epub 2021 Apr 23.

Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan.

Atrial fibrillation (AF) is one of the risk factors for dementia. Female sex is an inconsistent risk factor for dementia after adjusting for age in the general population, and there lacks research on its impact in developing dementia in patients with AF. This paper aims to investigate whether female sex is a risk factor for dementia in AF patients. Read More

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A Systematic Review on the Correlations between Left Atrial Strain and Cardiovascular Outcomes in Chronic Kidney Disease Patients.

Diagnostics (Basel) 2021 Apr 8;11(4). Epub 2021 Apr 8.

Nephrology Clinic, Dialysis, and Renal Transplant Center-'C.I. Parhon' University Hospital, 700503 Iasi, Romania.

Left atrial strain (LASr) represents a relatively new but promising technique for left atrial and left ventricle function evaluation. LASr was strongly linked to myocardial fibrosis and endocardial thickness, suggesting the utility of LASr in subclinical cardiac dysfunction detection. As CKD negatively impacts cardiovascular risk and mortality, underlying structural and functional abnormalities of cardiac remodeling are widely investigated. Read More

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Regression of Systolic Anterior Motion in Progressive Hypertrophic Cardiomyopathy.

Am J Case Rep 2021 Apr 29;22:e931359. Epub 2021 Apr 29.

Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel.

BACKGROUND Systolic anterior motion (SAM) is the dynamic anteriorly directed movement of the anterior mitral valve leaflet during systole toward the left ventricular outflow tract (LVOT). The history of SAM in progressive hypertrophic cardiomyopathy (HCM) is unclear. It is believed that SAM is an irreversible process that progresses as the gradient over the LVOT increases. Read More

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Total atrial conduction time as a possible predictor of atrial fibrillation recurrence after catheter ablation for paroxysmal atrial fibrillation: relationship between electrical atrial remodeling and structural atrial remodeling time courses.

J Med Ultrason (2001) 2021 Apr 28. Epub 2021 Apr 28.

Division of Clinical Laboratory, Kagoshima University Hospital, Kagoshima, Japan.

Purpose: Recently, the estimated total atrial conduction time measured using tissue Doppler imaging (PA-TDI duration) has been reported as a more accurate predictor of atrial fibrillation (AF) recurrence after catheter ablation than left atrial volume index (LAVI). The PA-TDI duration is considered to reflect electrical and structural remodeling in the right atrium (RA) and left atrium (LA). We sought to investigate the association between AF recurrence and PA-TDI duration after AF ablation. Read More

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Knockout of interleukin-17A diminishes ventricular arrhythmia susceptibility in diabetic mice via inhibiting NF-κB-mediated electrical remodeling.

Acta Pharmacol Sin 2021 Apr 28. Epub 2021 Apr 28.

Department of Pharmacology (State-Province Key Laboratories of Biomedicine Pharmaceutics of China, Key Laboratory of Cardiovascular research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, 150081, China.

Interleukin-17A (IL-17), a potent proinflammatory cytokine, has been shown to participate in cardiac electrical disorders. Diabetes mellitus is an independent risk factor for ventricular arrhythmia. In this study, we investigated the role of IL-17 in ventricular arrhythmia of diabetic mice. Read More

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Five-Year Outcomes and Cardiac Remodeling Following Left Atrial Appendage Occlusion.

Clin Interv Aging 2021 19;16:655-663. Epub 2021 Apr 19.

Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China.

Purpose: LAAO has been an alternative therapy to oral anticoagulants (OACs) for stroke prophylaxis in patients with nonvalvular atrial fibrillation (NVAF) with elevated CHADS-Vasc score, but the long-term outcomes of LAAO and its impacts on cardiac electrical and mechanical remodeling remain to be learned. We aimed to describe the impact of left atrial appendage occlusion (LAAO) on atrial remodeling and cardiovascular outcomes within 5-year follow-up.

Patients And Methods: A total of 107 patients with nonvalvular atrial fibrillation (NVAF) undergoing LAAO in the Shanghai Tenth People's Hospital between January 2014 and July 2017 were included. Read More

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Significant abnormal glycemic variability increased the risk for arrhythmias in elderly type 2 diabetic patients.

BMC Endocr Disord 2021 Apr 27;21(1):83. Epub 2021 Apr 27.

Department of General Medicine, Qilu Hospital of Shandong University, No.107, Wen Hua Xi Road, Jinan, Shandong, China.

Background: Little is known about whether the influence of glycemic variability on arrhythmia is related to age in type 2 diabetes mellitus (T2DM). Therefore, we aimed to compare the association between glycemic variability and arrhythmia in middle-aged and elderly T2DM patients.

Methods: A total of 107 patients were divided into two groups: elderly diabetes mellitus group (EDM, n = 73) and middle-aged diabetes mellitus group (MDM, n = 34). Read More

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Impact of atrial mitral and tricuspid regurgitation on atrial fibrillation recurrence after ablation.

J Electrocardiol 2021 Apr 16;66:114-121. Epub 2021 Apr 16.

Division of Cardiovascular Medicine, Toho University Ohashi Medical Center, Japan.

Background: Atrial fibrillation (AF) induces functional mitral regurgitation (FMR) and tricuspid regurgitation (FTR) during atrial remodeling. FMR and FTR are associated with AF prognosis, but the effects for AF recurrence after ablation have not been determined conclusively.

Methods: Two hundred thirty nine patients who underwent AF ablation were enrolled. Read More

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Frataxin deficiency promotes endothelial senescence in pulmonary hypertension.

J Clin Invest 2021 Apr 27. Epub 2021 Apr 27.

CNRS, UMR 7275, Universite Cote d'Azur, Valbonne, France.

The dynamic regulation of endothelial pathophenotypes in pulmonary hypertension (PH) remains undefined. Cellular senescence is linked to PH with intracardiac shunts; however, its regulation across PH subtypes is unknown. Since endothelial deficiency of iron-sulfur (Fe-S) clusters is pathogenic in PH, we hypothesized that a Fe-S biogenesis protein, frataxin (FXN), controls endothelial senescence. Read More

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Magnetic probe-based microrheology reveals local softening and stiffening of 3D collagen matrices by fibroblasts.

Biomed Microdevices 2021 Apr 26;23(2):27. Epub 2021 Apr 26.

Department of Mechanical Engineering, Stanford University, Stanford, CA, USA.

Changes in extracellular matrix stiffness impact a variety of biological processes including cancer progression. However, cells also actively remodel the matrices they interact with, dynamically altering the matrix mechanics they respond to. Further, cells not only react to matrix stiffness, but also have a distinct reaction to matrix viscoelasticity. Read More

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Abnormal Cardiac Repolarization After Seizure Episodes in Structural Brain Diseases: Cardiac Manifestation of Electrical Remodeling in the Brain?

J Am Heart Assoc 2021 May 26;10(9):e019778. Epub 2021 Apr 26.

Department of Acute Critical Care and Disaster Medicine Tokyo Medical and Dental University Tokyo Japan.

Background Abnormal cardiac repolarization is observed in patients with epilepsy and can be associated with sudden death. We investigated whether structural brain abnormalities are correlated with abnormal cardiac repolarizations in patients with seizure or epilepsy. Methods and Results We retrospectively analyzed and compared 12-lead ECG parameters following seizures between patients with and without structural brain abnormalities. Read More

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Tricuspid annular dilation in patients undergoing early mitral valve surgery: is it an old story?

Int J Cardiovasc Imaging 2021 Apr 25. Epub 2021 Apr 25.

Department of Cardiovascular Imaging - Centro, Cardiologico Fondazione Monzino IRCCS, via Carlo Parea 4, 20138, Milan, MI, Italy.

Patients with mitral valve prolapse (MVP), undergoing early surgery for severe regurgitation, are usually characterized by a low degree of right chambers' remodeling. In this selected population, the mechanisms leading to tricuspid annular (TA) dilatation (TAD) are not well understood. In this setting, we aimed to evaluate, using three-dimensional echocardiography (3DE), how right chambers affect TA size and might contribute to functional tricuspid regurgitation (FTR) progression. Read More

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Modeling the Effects of Calcium Overload on Mitochondrial Ultrastructural Remodeling.

Appl Sci (Basel) 2021 Mar 26;11(5). Epub 2021 Feb 26.

Department of Physiology, Michigan State University, East Lansing, MI 48824, USA.

Mitochondrial cristae are dynamic invaginations of the inner membrane and play a key role in its metabolic capacity to produce ATP. Structural alterations caused by either genetic abnormalities or detrimental environmental factors impede mitochondrial metabolic fluxes and lead to a decrease in their ability to meet metabolic energy requirements. While some of the key proteins associated with mitochondrial cristae are known, very little is known about how the inner membrane dynamics are involved in energy metabolism. Read More

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A Computational Study of the Effects of Tachycardia-Induced Remodeling on Calcium Wave Propagation in Rabbit Atrial Myocytes.

Front Physiol 2021 9;12:651428. Epub 2021 Apr 9.

Simula Research Laboratory, Computational Physiology Department, Lysaker, Norway.

In atrial cardiomyocytes without a well-developed T-tubule system, calcium diffuses from the periphery toward the center creating a centripetal wave pattern. During atrial fibrillation, rapid activation of atrial myocytes induces complex remodeling in diffusion properties that result in failure of calcium to propagate in a fully regenerative manner toward the center; a phenomenon termed "calcium silencing." This has been observed in rabbit atrial myocytes after exposure to prolonged rapid pacing. Read More

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Ganglionated Plexi Ablation Suppresses Chronic Obstructive Sleep Apnea-Related Atrial Fibrillation by Inhibiting Cardiac Autonomic Hyperactivation.

Front Physiol 2021 9;12:640295. Epub 2021 Apr 9.

Xinjiang Key Laboratory of Cardiac Electrophysiology and Cardiac Remodeling, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China.

Previous studies have reported that right pulmonary artery ganglionated plexi (GP) ablation could suppress the onset of atrial fibrillation (AF) associated with obstructive sleep apnea (OSA) within 1 h. This study aimed to investigate the effect of superior left GP (SLGP) ablation on AF in a chronic OSA canine model. Fifteen beagles were randomly divided into three groups: control group (CTRL), OSA group (OSA), and OSA + GP ablation group (OSA + GP). Read More

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A systematic review and meta-analysis to determine the effect of oral anticoagulants on incidence of dementia in patients with atrial fibrillation.

Int J Clin Pract 2021 Apr 24:e14269. Epub 2021 Apr 24.

Department of Cardiology, Peking University First Hospital, Beijing, China.

Aims: To assess the effect of oral anticoagulant (OAC) administration on incidence of dementia in patients with atrial fibrillation (AF) with Systematic review and meta-analysis.

Methods: We systematically searched the electronic databases including Pubmed, Embase, Cochrane library and ClinicalTrails.gov for relevant articles. Read More

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Computational models of atrial fibrillation: achievements, challenges and perspectives for improving clinical care.

Cardiovasc Res 2021 Apr 23. Epub 2021 Apr 23.

Alliance for Cardiovascular Diagnostic and Treatment Innovation, and Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD; Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD.

Despite significant advances in its detection, understanding and management, atrial fibrillation (AF) remains a highly prevalent cardiac arrhythmia with major impact on morbidity and mortality of millions of patients. AF results from complex, dynamic interactions between risk factors and comorbidities that induce diverse atrial remodeling processes. Atrial remodeling increases AF vulnerability and persistence, while promoting disease progression. Read More

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