The importance of mechano-electrical feedback and inertia in cardiac electromechanics
By F. Sahli Costabal, Felipe Concha, Daniel E. Hurtado, Ellen Kuhl. 2017
66 citations recorded by the source corpus.
In the past years, a number cardiac electromechanics models have been developed to better understand the excitation-contraction behavior of the heart. However, there is no agreement on whether inertial forces play a role in this system. In this study, we assess the influence of mass in electromechanical simulations, using a fully coupled finite element model. We include the effect of mechano-electrical feedback via stretch activated currents. We compare five different models: electrophysiology, electromechanics, electromechanics with mechano-electrical feedback, electromechanics with mass, and electromechanics with mass and mechano-electrical feedback. We simulate normal conduction to study conduction velocity and spiral waves to study fibrillation. During normal conduction, mass in conjunction with mechano-electrical feedback increased the conduction velocity by 8.12% in comparison to the plain electrophysiology case. During the generation of a spiral wave, mass and mechano-electrical feedback generated secondary wavefronts, which were not present in any other model. These secondary wavefronts were initiated in tensile stretch regions that induced electrical currents. We expect that this study will help the research community to better understand the importance of mechanoelectrical feedback and inertia in cardiac electromechanics.
Subfields: Atomic and Molecular Physics, and Optics, Cardiology and Cardiovascular Medicine
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Citations in the corpus
- Physics-Informed Neural Networks for Cardiac Activation Mapping (2020, background): “However, most current techniques [2, 3] ignore the underlying physics of the electrical wave propagation [6].”