Cardiac Electrical Modeling for Closed-loop Validation of Implantable Devices

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dc.contributor.author Ai, Weiwei en
dc.contributor.author Patel, Nitish en
dc.contributor.author Roop, Parthasarathi en
dc.contributor.author Malik, Avinash en
dc.contributor.author Trew, Mark en
dc.date.accessioned 2019-10-08T09:32:41Z en
dc.date.issued 2019-05-16 en
dc.identifier.issn 1558-2531 en
dc.identifier.uri http://hdl.handle.net/2292/48518 en
dc.description.abstract Objective: Evaluating and testing cardiac electrical devices in a closed-physiologic-loop can help design safety, but this is rarely practical or comprehensive. Furthermore, in-silico closed-loop testing with biophysical computer models cannot meet the requirements of time-critical cardiac device systems, while simplified models meeting time-critical requirements may not have the necessary dynamic features. We propose a new high-level (abstracted) physiologically-based computational heart model that is time-critical and dynamic. Methods: The model comprises cardiac regional cellular-electrophysiology types connected by a path model along a conduction network. The regional electrophysiology and paths are modeled with hybrid automata that capture non-linear dynamics, such as action potential and conduction velocity restitution and overdrive suppression. The hierarchy of pacemaker functions is incorporated to generate sinus rhythms, while abnormal automaticity can be introduced to form a variety of arrhythmias such as escape ectopic rhythms. Model parameters are calibrated using experimental data and prior model simulations. Conclusion: Regional electrophysiology and paths in the model match human action potentials, dynamic behavior and cardiac activation sequences. Connected in closed-loop with a pacing device in DDD mode, the model generates complex arrhythmia such as atrioventricular nodal reentry tachycardia. Such device-induced outcomes have been observed clinically and we can establish the key physiological features of the heart model that influence the device operation. Significance: These findings demonstrate how an abstract heart model can be used for device validation and to design personalized treatment. en
dc.publisher Institute of Electrical and Electronics Engineers en
dc.relation.ispartofseries IEEE Transactions on Biomedical Engineering en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title Cardiac Electrical Modeling for Closed-loop Validation of Implantable Devices en
dc.type Journal Article en
dc.identifier.doi 10.1109/TBME.2019.2917212 en
dc.rights.holder Copyright: The author en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 778896 en
pubs.org-id Bioengineering Institute en
pubs.org-id ABI Associates en
pubs.org-id Engineering en
pubs.org-id Department of Electrical, Computer and Software Engineering en
pubs.record-created-at-source-date 2019-08-13 en
pubs.dimensions-id 31095474 en


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