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Ventricular arrhythmias Research

23:24 EST 22nd January 2020 | BioPortfolio

Urolithin B improves cardiac function and reduces susceptibility to ventricular arrhythmias in rats after myocardial infarction.

Cardiac fibrosis and inflammation play critical roles in ventricular remodelling after myocardial infarction (MI). Urolithin B (UB), a metabolite of ellagitannin-rich foods, has various biological activities, but its effect on ventricular remodelling after MI has not been determined. The present study evaluated whether UB inhibited ventricular structural remodelling and decreased the occurrence of...

Routine Use of Cardiovascular Magnetic Resonance in the Work-Up of Patients With Ventricular Arrhythmias?

Computational approaches for detection of cardiac rhythm abnormalities: Are we there yet?

The analysis of an electrocardiogram (ECG) is able to provide vital information on the electrical activity of the heart and is crucial for the accurate diagnosis of cardiac arrhythmias. Due to the nature of some arrhythmias, this might be a time-consuming and difficult to accomplish process. The advent of novel machine learning technologies in this field has a potential to revolutionise the use of...

Correction to: Two-year follow-up of one-stage left unilateral thoracoscopic epicardial and transcatheter endocardial ablation for persistent and long-standing persistent atrial fibrillation.

Owing to a type error during final correction and proof data submission to the journal, there were mistakes introduced into the legends of Fig. 3 and Fig. 4 as well as into the Y-axis title of the plot of Fig. 4.

Aberrant sinus node firing during β-adrenergic stimulation leads to cardiac arrhythmias in diabetic mice.

Cardiovascular complications, including cardiac arrhythmias, result in high morbidity and mortality in patients with type-2 diabetes mellitus (T2DM). Clinical and experimental data suggest electrophysiological impairment of the natural pacemaker of the diabetic heart. The present study examined sinoatrial node (SAN) arrhythmias in a mouse model of T2DM and physiologically probed their underlying c...

Association between physical activity and risk of incident arrhythmias in 402 406 individuals: evidence from the UK Biobank cohort.

Physical activity reduces cardiovascular disease burden and mortality, although its relationship with cardiac arrhythmias is less certain. The aim of this study was to assess the association between self-reported physical activity and atrial fibrillation (AF), ventricular arrhythmias and bradyarrhythmias, across the UK Biobank cohort.

The impact of 21-hydroxylase deficiency on cardiac repolarization changes in children with 21-hydroxylasedeficient congenital adrenal hyperplasia.

Korkmaz HA, Özdemir R, Küçük M, Karadeniz C, Meşe T, Özkan B. The impact of 21-hydroxylase deficiency on cardiac repolarization changes in children with 21-hydroxylase-deficient congenital adrenal hyperplasia. Turk J Pediatr 2019; 61: 228-235. 21-hydroxylase-deficient congenital adrenal hyperplasia (CAH) is associated with cardiovascular risk factors such as, hypertension, obesity, dyslipide...

Correction to: Restitution metrics in Brugada syndrome: a systematic review and meta-analysis.

The original version of this article unfortunately has a typo error. The name of the author "Kamalan Jeeveratnam" should be presented as "Kamalan Jeevaratnam" as shown above.

Fibroblast growth factor homologous factors are potential ion channel modifiers associated with cardiac arrhythmias.

Stable electrical activity in cardiac myocytes is the basis of maintaining normal myocardial systolic and diastolic function. Cardiac ionic currents and their associated regulatory proteins are crucial to myocyte excitability and heart function. Fibroblast growth factor homologous factors (FHFs) are intracellular noncanonical fibroblast growth factors (FGFs) that are incapable of activating FGF re...

Inhibitory effect of gallic acid on voltage-gated Na channels in rat cardiomyocytes.

Gallic acid (GA) has a protective effect on the cardiovascular system. To study its cardiac electrophysiological effects, voltage-gated Na channel currents (I ) were recorded in rat cardiomyocytes using whole-cell patch clamp techniques. Moreover, the effects of GA on aconitine-induced arrhythmias were assessed using electrocardiograms in vivo. We found that the current-voltage characteristic curv...

Prevention of Connexin43 remodeling protects against duchenne muscular dystrophy cardiomyopathy.

Aberrant expression of the cardiac gap junction protein connexin-43 (Cx43) has been suggested to play a role in the development of cardiac disease in the mdx mouse model of Duchenne muscular dystrophy (DMD), however a mechanistic understanding of this association is lacking. Here, we identified a reduction of phosphorylation of Cx43 serines S325/S328/S330 in human and mouse DMD hearts. We hypothes...

Heart failure and late leaks should be considered as late complications of left atrial appendage occlusion.

The challenge of non-invasive assessment of risk in Brugada syndrome.

Fibroblast growth factor 21 inhibited ischemic arrhythmias via targeting miR-143/EGR1 axis.

Ventricular arrhythmia is the most common cause of sudden cardiac death in patients with myocardial infarction (MI). Fibroblast growth factor 21 (FGF21) has been shown to play an important role in cardiovascular and metabolic diseases. However, the effects of FGF21 on ventricular arrhythmias following MI have not been addressed yet. The present study was conducted to investigate the pharmacologica...

Altered adrenergic response in myocytes bordering a chronic myocardial infarction underlies in vivo triggered activity and repolarization instability.

Ventricular arrhythmias are a major complication after myocardial infarction (MI), associated with sympathetic activation. The structurally heterogeneous peri-infarct zone is a known substrate but the functional role of the myocytes is less well known. Using monophasic action potentials in vivo one can observe that the peri-infarct zone is a source of delayed afterdepolarizations (DADs) and has a ...

Challenges in stroke prevention among very elderly patients with atrial fibrillation: discerning facts from prejudices.

Endocardial ventricular pulsed field ablation: a proof-of-concept preclinical evaluation.

Pulsed field ablation (PFA) is a novel, non-thermal modality that selectively ablates myocardium with ultra-short electrical impulses while sparing collateral tissues. In a proof-of-concept study, the safety and feasibility of ventricular PFA were assessed using a prototype steerable, endocardial catheter.

Corrigendum.

Morphometry and comparative histology of sinus and atrioventricular nodes in humans and pigs and their relevance in the prevention of nodal arrhythmias.

The cardiac conduction system is a network structure that allows the initiation and fast propagation of electrical impulses that trigger the electrical depolarization of the myocardial tissue. The purpose of this work is to study the histological and morphometric characteristics of the different components of the sinus and atrioventricular nodes in humans and pigs and their relationship with supra...

Left ventricular wall thickness assessed by cardiac computed tomography and cardiac resynchronization therapy outcomes.

Up to 30% of selected heart failure patients do not benefit clinically from cardiac resynchronization therapy (CRT). Left ventricular (LV) wall thickness (WT) analysed using computed tomography (CT) has rarely been evaluated in response to CRT and mitral regurgitation (MR) improvement. We examined the association of LVWT and the ability to reverse LV remodelling and MR improvement after CRT.

Atrial fibrillation progression risk factors and associated cardiovascular outcome in well-phenotyped patients: data from the AF-RISK study.

Atrial fibrillation (AF) is a progressive disease, but identifying patients at risk for AF progression is challenging. We aimed to identify factors associated with AF progression.

Improved brain perfusion after electrical cardioversion of atrial fibrillation.

Atrial fibrillation (AF) has been associated with reduced brain volume, cognitive impairment, and reduced cerebral blood flow. The causes of reduced cerebral blood flow in AF are unknown, but no reduction was seen in individuals without the arrhythmia in a previous study. The aim of this study was to test the hypothesis that brain perfusion, measured with magnetic resonance imaging (MRI), improves...

A single-dose of stellate ganglion block for the prevention of postoperative dysrhythmias in patients undergoing thoracoscopic surgery for cancer: A prospective randomised controlled double-blind trial.

New-onset arrhythmias and sleep disturbances are frequently observed during the postoperative period in patients undergoing thoracic surgery.

Ventricular arrhythmias in patients with biventricular assist devices.

Ventricular arrhythmias (VAs) are common in patients after left ventricular assist device (LVAD) implant and are associated with worse outcomes. However, the prevalence and impact of VA in patients with durable biventricular assist device (BIVAD) is unknown. We performed a retrospective cohort study of patients with BIVADs to evaluate the prevalence of VA and their clinical outcomes.

Effect of BIN1 on cardiac dysfunction and malignant arrhythmias.

Heart failure (HF) is the end-stage syndrome for most cardiac diseases, and the five-year morbidity and mortality of HF remain high. Malignant arrhythmia is the main cause of sudden death in the progression of HF. Recently, bridging integrator 1 (BIN1) was discovered as a regulator of transverse-tubule (T-tubule) function and calcium signaling in cardiomyocytes. BIN1 downregulation is linked to ab...

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