Premature ventricular complex (PVC) is common in the general population. Symptoms vary from none to pronounced. The prognostic significance of PVC's depends on the presence of underlying structural heart disease. The clinical evaluation in patients with PVC aims at excluding structural heart disease and usually involves transthoracic echocardiogram and Holter. Patients without structural heart disease usually have a good prognosis. Frequent PVC's may cause impaired left ventricular function, which usually is reversible after treatment with drugs or ablation. A 12-lead ECG provides important information about PVC localization, however anatomical factors such as the heart's localization in the thorax as well as electrode placement and pharmacological treatment may affect the ECG appearance. In symptomatic patients with or without left ventricular impairment, pharmacological treatment or catheter ablation is indicated. However, in most cases the main goal is to reasure the patient of the good prognosis. To summarize, treatment of choice depends on symptoms, comorbidities, left ventricular function and patient's choice.
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Inflamm Regen
December 2024
Department of Molecular and Cellular Pharmacology, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, 467-8603, Japan.
Vascular smooth muscle cells (VSMCs) and endothelial cells (ECs) act together to regulate blood pressure and systemic blood flow by appropriately adjusting blood vessel diameter in response to biochemical or biomechanical stimuli. Ion channels that are expressed in these cells regulate membrane potential and cytosolic Ca concentration ([Ca]) in response to such stimuli. The subsets of these ion channels involved in Ca signaling often form molecular complexes with intracellular molecules via scaffolding proteins.
View Article and Find Full Text PDFNat Commun
December 2024
Experimental Medicine & Immunotherapeutics, University of Cambridge, Cambridge, UK.
We describe a structural and functional study of the G protein-coupled apelin receptor, which binds two endogenous peptide ligands, apelin and Elabela/Toddler (ELA), to regulate cardiovascular development and function. Characterisation of naturally occurring apelin receptor variants from the UK Genomics England 100,000 Genomes Project, and AlphaFold2 modelling, identifies T89 as important in the ELA binding site, and R168 as forming extensive interactions with the C-termini of both peptides. Base editing to introduce an R/H168 variant into human stem cell-derived cardiomyocytes demonstrates that this residue is critical for receptor binding and function.
View Article and Find Full Text PDFCardiol Rev
October 2024
Department of Cardiology, Royal Devon University Healthcare National Health Service Foundation Trust, Exeter, United Kingdom.
Hypertrophic cardiomyopathy (HCM) is a genetic cardiac disorder characterized by structural and functional abnormalities. Current management strategies, such as medications and septal reduction therapies, have significant limitations and risks. Recently, cardiac myosin inhibitors (CMIs) like mavacamten and aficamten have shown promise as noninvasive treatment options.
View Article and Find Full Text PDFLancet Reg Health Eur
December 2024
School of Health and Wellbeing, University of Glasgow, UK.
Background: Socioeconomic inequality in infant mortality in the UK is rising. This study aims to identify contributory maternal and pregnancy factors that can explain the known association between area deprivation and infant mortality.
Methods: A cohort study was conducted using Clinical Practice Research Datalink (CPRD) primary care data between 2004 and 2019 linked to the Index of Multiple Deprivation (IMD), and infant mortality from the Office for National Statistics death data.
ACS Biomater Sci Eng
December 2024
Department of Cell Engineering, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran 16635-148, Iran.
To enhance therapeutic strategies for cardiovascular diseases, the development of more reliable in vitro preclinical systems is imperative. These models, crucial for disease modeling and drug testing, must accurately replicate the 3D architecture of native heart tissue. In this study, we engineered a scaffold with aligned poly(lactic--glycolic acid) (PLGA) microfilaments to induce cellular alignment in the engineered cardiac microtissue (ECMT).
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