Advanced Biomedical Engineering
Online ISSN : 2187-5219
ISSN-L : 2187-5219
Effects of Morphologically Asymmetric Junctions on the Effective Refractory Period of the Accessory Pathway in Wolff-Parkinson-White Syndrome: A Simulation Study
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2024 Volume 13 Pages 230-236


Wolff‒Parkinson‒White (WPW) syndrome is characterized by an anomalous accessory pathway (AP) connecting the atrium and ventricle, leading to abnormal myocardial excitation and cardiac arrhythmias. The effective refractory period (ERP) of the AP is crucial for risk stratification. Building on previous research indicating the significance of the source‒sink mismatch mechanism in AP conduction, this study explored the hypothesis that the ERP of the AP involves such a source‒sink relationship. To investigate this, computer simulations of antegrade and retrograde AP conduction were conducted using simplified models, focusing on the presence or absence of asymmetrical junctions in AP conduction among patients with WPW syndrome. Analysis revealed that morphological features at the AP junction significantly altered the source‒sink relationship, consequently affecting the ERP of the AP. Thus, the asymmetrical shape primarily determines the ERP in both antegrade and retrograde AP conduction. This study provides novel insights into the ERP of the AP in WPW syndrome.

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© 2024 Japanese Society for Medical and Biological Engineering

Copyright: ©2024 The Author(s). This is an open access article distributed under the terms of the Creative Commons BY 4.0 International (Attribution) License (, which permits the unrestricted distribution, reproduction and use of the article provided the original source and authors are credited.
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