Key result
In silico perturbations of human ventricular cardiomyocytes demonstrated that arrhythmia progresses from prolonged paced action potentials to atypical action potentials and self-sustaining oscillations.
Why the study?
The native dynamic inward-outward current balance governing ventricular action potentials is subject to disruption caused by acquired or inherited channelopathies, prompting investigation into pro-arrhythmic effects of specific perturbations.
Computational modeling of human ventricular cardiomyocytes reveals that arrhythmia progression from hERG or Nav1.5 perturbations involves abrupt transitions to atypical depolarizations driven by Cav1.2.
Answers are grounded in this paper and cite their sources.
In silico arrhythmia models are hypothesis-generating; leaves open experimental validation and clinical translation.
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Selvaggio et al. (2020) studied Arrhythmia. Arrhythmia-inducing perturbations (hERG blockade, LQT2, LQT3 mutations) vs. Undiseased human ventricular cardiomyocyte model was evaluated on Action potential morphology and arrhythmogenesis. In silico perturbations of human ventricular cardiomyocytes demonstrated that arrhythmia progresses from prolonged paced action potentials to atypical action potentials and self-sustaining oscillations.
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