Nonlinear and stochastic dynamics in the heart

Z Qu, G Hu, A Garfinkel, JN Weiss - Physics reports, 2014 - Elsevier
In a normal human life span, the heart beats about 2–3 billion times. Under diseased
conditions, a heart may lose its normal rhythm and degenerate suddenly into much faster …

Cardiac alternans: from bedside to bench and back

Z Qu, JN Weiss - Circulation research, 2023 - Am Heart Assoc
Cardiac alternans arises from dynamical instabilities in the electrical and calcium cycling
systems of the heart, and often precedes ventricular arrhythmias and sudden cardiac death …

Global, regional, and national age-sex-specific mortality and life expectancy, 1950–2017: a systematic analysis for the Global Burden of Disease Study 2017

D Dicker, G Nguyen, D Abate, KH Abate, SM Abay… - The lancet, 2018 - thelancet.com
Background Assessments of age-specific mortality and life expectancy have been done by
the UN Population Division, Department of Economics and Social Affairs (UNPOP), the …

A rule‐based method to model myocardial fiber orientation in cardiac biventricular geometries with outflow tracts

R Doste, D Soto‐Iglesias, G Bernardino… - … journal for numerical …, 2019 - Wiley Online Library
Rule‐based methods are often used for assigning fiber orientation to cardiac anatomical
models. However, existing methods have been developed using data mostly from the left …

[HTML][HTML] Machine learning in drug development: Characterizing the effect of 30 drugs on the QT interval using Gaussian process regression, sensitivity analysis, and …

FS Costabal, K Matsuno, J Yao, P Perdikaris… - Computer Methods in …, 2019 - Elsevier
Prolonged QT intervals are a major risk factor for ventricular arrhythmias and a leading
cause of sudden cardiac death. Various drugs are known to trigger QT interval prolongation …

Electrophysiological mechanisms underlying T-wave alternans and their role in arrhythmogenesis

T You, C Luo, K Zhang, H Zhang - Frontiers in physiology, 2021 - frontiersin.org
T-wave alternans (TWA) reflects every-other-beat alterations in the morphology of the
electrocardiogram ST segment or T wave in the setting of a constant heart rate, hence, in the …

A machine-learning approach for long-term prediction of experimental cardiac action potential time series using an autoencoder and echo state networks

S Shahi, FH Fenton, EM Cherry - Chaos: An Interdisciplinary Journal of …, 2022 - pubs.aip.org
Computational modeling and experimental/clinical prediction of the complex signals during
cardiac arrhythmias have the potential to lead to new approaches for prevention and …

Computational modeling of non-linear diffusion in cardiac electrophysiology: A novel porous-medium approach

DE Hurtado, S Castro, A Gizzi - Computer Methods in Applied Mechanics …, 2016 - Elsevier
The electrophysiological behavior of excitable biological media has been traditionally
modeled using a nonlinear reaction–diffusion equation commonly known as the cable …

Experimental validation of a variational data assimilation procedure for estimating space-dependent cardiac conductivities

A Barone, A Gizzi, F Fenton, S Filippi… - Computer Methods in …, 2020 - Elsevier
Customization of mathematical and numerical models to patient-specific settings is a critical
step of the translation process bringing scientific computing to the clinical activity. In …

Long-time prediction of arrhythmic cardiac action potentials using recurrent neural networks and reservoir computing

S Shahi, CD Marcotte, CJ Herndon, FH Fenton… - Frontiers in …, 2021 - frontiersin.org
The electrical signals triggering the heart's contraction are governed by non-linear
processes that can produce complex irregular activity, especially during or preceding the …