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http://dx.doi.org/10.1161/CIRCULATIONAHA.121.053765 | DOI Listing |
Cardiovasc Endocrinol Metab
March 2025
Department of Cardiology, Sri Jayadeva Institute of Cardiovascular Sciences and Research, Kalaburagi, Karnataka, India.
Hypothyroidism is typically associated with bradyarrhythmias, but can rarely precipitate life-threatening ventricular arrhythmias. We present a case of severe hypothyroidism manifesting as polymorphic ventricular tachycardia (VT). A previously healthy woman in her early 50s presented with an acute onset of breathlessness and on examination had hypotension and tachycardia.
View Article and Find Full Text PDFCardiol Young
January 2025
Department of Cardiovascular Surgery, Hacettepe University, Ankara, Turkey.
Background: Ebstein's anomaly represents 40% of congenital tricuspid valve abnormalities. Studies about paediatric Ebstein's anomaly patients are limited.
Aim: To evaluate clinical characteristics, treatment (medical/arrhythmia ablation/surgical) results, and outcome of Ebstein's anomaly patients, and to determine factors affecting arrhythmia presence and mortality.
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.
View Article and Find Full Text PDFJAMA Netw Open
January 2025
Department of Neurology, Duke University School of Medicine, Durham, North Carolina.
Importance: Atrial fibrillation (AF) is the most common, chronic, cardiac arrythmia in older US adults. It is not known whether AF is independently associated with increased risk of retinal stroke (central retinal artery occlusion), a subtype of ischemic stroke that causes severely disabling visual loss in most cases and is a harbinger of further vascular events.
Objective: To determine whether there is an association between AF and retinal stroke.
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