Key result
3D modeling shows phase-2 EADs are canards, explaining their facilitation by low-frequency stimulation.
Why the study?
Biophysical mechanisms alone do not fully explain why pacing frequency affects the production of early afterdepolarizations in cardiomyocytes.
Does pacing frequency affect the production of early afterdepolarizations in a minimal cardiomyocyte model?
Population
Minimal 3D cardiomyocyte mathematical model
Design
Computational modeling and slow/fast mathematical analysis study
Authors
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Low-frequency pacing may facilitate phase-2 EADs via canard dynamics in models; leaves open in vivo validation and clinical pacing implications.
Does pacing frequency affect the production of early afterdepolarizations in a minimal cardiomyocyte model?
This mathematical modeling study provides a mechanistic explanation for why low pacing frequencies facilitate early afterdepolarizations, complementing existing biophysical knowledge.
Vo et al. (2019) studied Early afterdepolarizations (EADs) in cardiomyocytes. Minimal 3D mathematical model with slow/fast analysis was evaluated. A minimal 3D mathematical model demonstrates that phase-2 early afterdepolarizations are canards formed near a folded node singularity, explaining their facilitation by low-frequency stimulation.
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