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ECG analysis of ventricular fibrillation dynamics reflects ischaemic progression subject to variability in patient anatomy and electrode location.
Front Cardiovasc Med
November 2024
Department of Computer Science, British Heart Foundation Centre of Research Excellence, University of Oxford, Oxford, United Kingdom.
Background: Ventricular fibrillation (VF) is the deadliest arrhythmia, often caused by myocardial ischaemia. VF patients require urgent intervention planned quickly and non-invasively. However, the accuracy with which electrocardiographic (ECG) markers reflect the underlying arrhythmic substrate is unknown.
View Article and Find Full Text PDFRobotic totally endoscopic Cryo-Maze ablation under ventricular fibrillatory arrest.
Multimed Man Cardiothorac Surg
December 2024
Department of Surgery, Section of Cardiac Surgery, The University of Chicago 5841S Maryland Avenue, Chicago, Illinois 60637, USA.
Article Synopsis
- The video tutorial explains robotic totally endoscopic Cryo-Maze ablation, a surgical procedure used to treat atrial fibrillation.
- It involves using advanced robotic technology to perform the procedure with minimal invasiveness.
- The surgery is conducted under moderate hypothermic ventricular fibrillatory arrest to enhance patient safety and effectiveness of the treatment.
Prevalence of endoepicardial asynchrony and breakthrough patterns in a bilayer computational model of heterogeneous endoepicardial dissociation in the left atrium.
PLoS One
November 2024
Department of Pharmacology and Physiology, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada.
Article Synopsis
- The study examines how structural changes in the heart, specifically fibrosis and endoepicardial dissociation, impact the activation delays during atrial fibrillation.
- Using a computational model, researchers simulated various arrhythmogenic scenarios to understand how these factors influenced the rate and distribution of electrical activation in the heart.
- Results showed that increased fibrosis and disconnection between heart layers led to longer activation delays and more frequent short-lived breakthrough events, indicating a complex relationship between structural remodeling and atrial fibrillation dynamics.
Atrial fibrillation nomenclature, definitions, and mechanisms: Position paper from the international Working Group of the Signal Summit.
Heart Rhythm
November 2024
Cardiovascular Division, Shamir Medical Center, Be'er Yaakov, Israel.
Article Synopsis
Quantifying the frequency modulation in electrograms during simulated atrial fibrillation in 2D domains.
Comput Biol Med
November 2024
MATBIOM, Universidad de Medellín, Medellín, Colombia.
Article Synopsis
- * Traditional ablation methods may not fully utilize dynamic features in electrogram (EGM) signals, but using the fractional Fourier transform (FrFT) can help capture these time-varying aspects, improving the understanding of AF mechanisms and treatment strategies.
- * A new FrFT-based algorithm enhances analysis of EGM signals from simulated AF, optimizing the representation of frequency changes, which helps identify areas of abnormal heart activity and can guide more effective ablation techniques.
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