Localized transient conduction block to suppress and eliminate spiral wave doppler instability: A numerical simulation study

Hongling Xu, Weibang Wu and Debei Pan

Chaos, Solitons & Fractals, 2025, vol. 193, issue C

Abstract: Atrial fibrillation (AF) is a common cardiac arrhythmia associated with spiral wave Doppler instability. Current ablation strategies in clinical practice primarily aim to isolate wave propagation and prevent the formation and maintenance of re-entrant waves. In this study, we investigate the effects of targeted localized transient conduction blocks on controlling spiral wave Doppler instability in a maximally simplified, homogeneous model. Numerical simulations reveal that spiral waves approaching Doppler instability can be effectively anchored by introducing localized conduction blocks near their rotational centers, thereby suppressing spiral tips instability. Subsequently, the spiral waves can be guided to and eliminated at the nearest non-conducting boundaries. The effects of conduction block size, movement speed, and direction on spiral wave anchoring and elimination are systematically analyzed and evaluated. Moreover, the proposed approach is applicable in scenarios with multiple coexisting spiral wavelets within a medium. These findings provide valuable insights into the mechanisms of localized conduction block and offer a foundation for exploring potential strategies or methods to control spiral wave dynamics in excitable media.

Keywords: Spiral wave; Doppler instability; Localized transient conduction block; Numerical simulation (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:chsofr:v:193:y:2025:i:c:s0960077925001535

DOI: 10.1016/j.chaos.2025.116140

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