Purpose Of Review: This review examines the selective cardiac injury induced by pulsed electric fields during atrial fibrillation ablation. It consolidates findings from both preclinical and clinical studies on cardiac selectivity and explores the potential mechanisms behind this selectivity.
Recent Findings: Preclinical studies indicate that pulsed electric fields cause significantly more myocardial injury compared with other tissues. Clinical studies have similarly shown that complication rates for pulsed field ablation are notably lower than those for radiofrequency and cryoballoon ablation.
Summary: Pulsed field ablation demonstrates a notable selectivity for myocardial injury, likely because of the unique functional and metabolic characteristics of cardiomyocytes. This review delves into the underlying principles of cardiac selectivity and proposes future directions for improving this selectivity. It is important to note that while pulsed field ablation shows promise, its cardiac selectivity is not absolute, as some complications still occur, necessitating further research.
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http://dx.doi.org/10.1097/HCO.0000000000001183 | DOI Listing |
Proc Natl Acad Sci U S A
February 2025
Institut für Physiologie II, Universitätsklinikum Jena, Friedrich-Schiller-Universität Jena, Jena 07740, Germany.
In mammals, the four subunit isoforms HCN1-4 assemble to form functional homotetrameric and heterotetrameric hyperpolarization-activated cyclic nucleotide-modulated (HCN) ion channels. Despite the outstanding relevance of HCN channels for organisms, including generating electrical rhythmicity in cardiac pacemaker cells and diverse types of brain neurons, key channel properties are still elusive. In particular, the unitary conductance, of HCN channels is highly controversial.
View Article and Find Full Text PDFJ Am Chem Soc
January 2025
National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, P. R. China.
Due to their strong aromaticity and difficulties in chemo-, regio-, and enantioselectivity control, asymmetric hydrogenation of naphthol derivatives to 1,2,3,4-tetrahydronaphthols has remained a long-standing challenge. Herein, we report the first example of homogeneous asymmetric hydrogenation of naphthol derivatives catalyzed by tethered rhodium-diamine catalysts, affording a wide array of optically pure 1,2,3,4-tetrahydronaphthols in high yields with excellent regio-, chemo-, and enantioselectivities (up to 98% yield and >99% ee). Mechanistic studies with experimental and computational approaches reveal that fluorinated solvent 1,1,1,3,3,3-hexafluoroisopropanol (HFIP) plays vital roles in the control of reactivity and selectivity, and 1-naphthol is reduced via a cascade reaction pathway, including dearomative tautomerization, 1,4-hydride addition, and 1,2-hydride addition in sequence.
View Article and Find Full Text PDFGinekol Pol
January 2025
Department of Obstetrics and Gynecology Didactics, Faculty of Health Sciences, Medical University of Warsaw, Poland.
Objectives: Cardiotocography (KTG) is widely used for continuous or intermittent assessment of fetal heart function. This study aimed to compare the effects of continuous and intermittent KTG during labour on selected variables.
Material And Methods: In a retrospective study, 4172 medical records of Warsaw Hospital (Poland) patients were analysed.
Cureus
December 2024
Internal Medicine, Mercy Health St. Vincent Medical Center, Toledo, USA.
We present a case of spontaneous hemorrhage in an emphysematous bulla, complicated by anticoagulation. Bullous emphysema is a well-recognized complication of chronic obstructive pulmonary disease (COPD), and a rare manifestation is hemorrhage into preexisting pulmonary bullae. A 69-year-old male patient presented to the emergency department with hemoptysis, shortness of breath, and productive cough.
View Article and Find Full Text PDFFront Physiol
January 2025
Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan.
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