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A Comparison of Regional Classification Strategies Implemented for the Population Based Approach to Modelling Atrial Fibrillation

Author

Listed:
  • Jordan Elliott

    (Department of Chemical and Material Engineering, Politecnico Di Milano, 20133 Milan, Italy)

  • Maria Kristina Belen

    (Department of Chemical and Material Engineering, Politecnico Di Milano, 20133 Milan, Italy)

  • Luca Mainardi

    (Department of Electronic, Information and Bioengineering, Politecnico Di Milano, 20133 Milan, Italy)

  • Josè Felix Rodriguez Matas

    (Department of Chemical and Material Engineering, Politecnico Di Milano, 20133 Milan, Italy)

Abstract

(1) Background: in silico models are increasingly relied upon to study the mechanisms of atrial fibrillation. Due to the complexity associated with atrial models, cellular variability is often ignored. Recent studies have shown that cellular variability may have a larger impact on electrophysiological behaviour than previously expected. This paper compares two methods for AF remodelling using regional populations. (2) Methods: using 200,000 action potentials, experimental data was used to calibrate healthy atrial regional populations with two cellular models. AF remodelling was applied by directly adjusting maximum channel conductances. AF remodelling was also applied through adjusting biomarkers. The methods were compared upon replication of experimental data. (3) Results: compared to the percentage method, the biomarker approach resulted in smaller changes. RMP, APD20, APD50, and APD90 were changed in the percentage method by up to 11%, 500%, 50%, and 60%, respectively. In the biomarker approach, RMP, APD20, APD50, and APD90 were changed by up to 4.5%, 132%, 50%, and 35%, respectively. (4) Conclusion: applying AF remodelling through biomarker-based clustering resulted in channel conductance changes that were consistent with experimental data, while maintaining the highly non-linear relationships between channel conductances and biomarkers. Directly changing conductances in the healthy regional populations impacted the non-linear relationships and resulted in non-physiological APD20 and APD50 values.

Suggested Citation

  • Jordan Elliott & Maria Kristina Belen & Luca Mainardi & Josè Felix Rodriguez Matas, 2021. "A Comparison of Regional Classification Strategies Implemented for the Population Based Approach to Modelling Atrial Fibrillation," Mathematics, MDPI, vol. 9(14), pages 1-21, July.
    • Handle: RePEc:gam:jmathe:v:9:y:2021:i:14:p:1686-:d:596411
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    References listed on IDEAS

    as
    1. Laura Martinez-Mateu & Lucia Romero & Ana Ferrer-Albero & Rafael Sebastian & José F Rodríguez Matas & José Jalife & Omer Berenfeld & Javier Saiz, 2018. "Factors affecting basket catheter detection of real and phantom rotors in the atria: A computational study," PLOS Computational Biology, Public Library of Science, vol. 14(3), pages 1-26, March.
    2. Carlos Sánchez & Alfonso Bueno-Orovio & Erich Wettwer & Simone Loose & Jana Simon & Ursula Ravens & Esther Pueyo & Blanca Rodriguez, 2014. "Inter-Subject Variability in Human Atrial Action Potential in Sinus Rhythm versus Chronic Atrial Fibrillation," PLOS ONE, Public Library of Science, vol. 9(8), pages 1-14, August.
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