The early repolarization pattern and single coronary artery (SCA) anomaly are rare causes of sudden cardiac arrest. The relationship between the early repolarization pattern and idiopathic ventricular fibrillation has previously been reported. Here, we describe a case of an early repolarization pattern and L-IIB type of isolated SCA anomaly in a patient who suffered a sudden cardiac arrest.
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http://dx.doi.org/10.1016/j.jelectrocard.2019.08.010 | DOI Listing |
Cardiovasc Endocrinol Metab
March 2025
Department of Cardiology, G B Pant Institute of Postgraduate Medical Education and Research, New Delhi, India.
The impact of obesity on heart rate variability (HRV) and ventricular repolarization, both vital indicators of cardiovascular health, is the focus of this review. Obesity, measured by BMI, waist circumference, and waist-to-hip ratio, significantly increases cardiovascular disease (CVD) risk due to structural and autonomic heart changes. Findings show that obese individuals exhibit prolonged QT and Tpeak-to-Tend (Tpe) intervals, suggesting delayed ventricular recovery and greater arrhythmia risk.
View Article and Find Full Text PDFEur J Case Rep Intern Med
December 2024
Emergency Department, Ente Ospedaliero Cantonale - Ospedale Regionale di Lugano, Lugano, Switzerland.
Unlabelled: Kounis syndrome (KS), characterized by the simultaneous occurrence of acute coronary syndrome (ACS) and allergic reactions, can be triggered by a range of factors and drugs. We report on the case of a patient who arrived at our emergency department (ED) with symptoms of an allergic reaction after taking moxifloxacin and deflazacort orally. In the ED, the patient experienced a 5-minute episode of oppressive chest pain.
View Article and Find Full Text PDFHeart Rhythm
January 2025
Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, Food and Drug Administration, Silver Spring, MD, USA. Electronic address:
Background: Spontaneously occurring life threatening reentrant arrhythmias result when a propagating premature beat encounters a region with significant dispersion of refractoriness. Although localized structural tissue heterogeneities and prescribed cell functional gradients have been incorporated into computational electrophysiological models, a quantitative framework for the evolution from normal to abnormal behavior that occurs via disease is lacking.
Objective: The purpose of this study was to develop a probabilistic modeling framework that represents the complex interplay of cell function and tissue structure in health and disease which predicts the emergence of premature beats and the initiation of reentry.
Heart Rhythm
January 2025
Department of Molecular Biosciences, University of California, Davis, CA, USA; Department of Basic Sciences, California Northstate University, Elk Grove, CA. Electronic address:
Background: Friedreich's ataxia (FA) is a rare inherited neuromuscular disorder, where most patients die from lethal cardiomyopathy and arrhythmias. Mechanisms leading to arrhythmic events in FA patients are poorly understood.
Objective: This study aims to examine cardiac electrical signal propagation in mouse model of FA with severe cardiomyopathy and evaluate effects of omaveloxolone (OMAV), the first FDA-approved therapy.
JCI Insight
January 2025
Department of Pharmacology, University of Michigan Medical School, Ann Arbor, United States of America.
The hERG1 potassium channel conducts the cardiac repolarizing current, IKr. hERG1 has emerged as a therapeutic target for cardiac diseases marked by prolonged actional potential duration (APD). Unfortunately, many hERG1 activators display off-target and proarrhythmic effects that limit their therapeutic potential.
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