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

Jordan Elliott, Maria Kristina Belen, Luca Mainardi and Josè Felix Rodriguez Matas
Additional contact information
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

Mathematics, 2021, vol. 9, issue 14, 1-21

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.

Keywords: atrial fibrillation; AF remodelling; population of models; regional classification (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2227-7390/9/14/1686/pdf (application/pdf)
https://www.mdpi.com/2227-7390/9/14/1686/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jmathe:v:9:y:2021:i:14:p:1686-:d:596411

Access Statistics for this article

Mathematics is currently edited by Ms. Emma He

More articles in Mathematics from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().