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The cardiac equivalent source model is very crucial in the electrocardiogram (ECG) and magnetocardiography (MCG) problems. In this study, we presented a thoroughly investigation of the three models: the dipole, equivalent double layer (EDL) and epicardial potential (EP) models in terms of the ECG/MCG forward problem within a unified framework. The cardiac electromagnetic field is calculated using...
In modern magnetic resonance imaging (MRI), there are concerns for the health and safety of patients and workers repeatedly exposed to magnetic fields, and therefore accurate and efficient evaluation of in situ electromagnetic field (EMF) distributions has gained a lot of significance. This paper presents a Biconjugate Gradient Method (BiCG) to efficiently implement the quasi-static finite-difference...
A mathematical model of the action potential (AP) of human ventricular cell is constructed and used in simulation studies of Brugada syndrome. The model is based on Luo-Rudy model, and refined by recent experimental data on major ionic currents, and the formulations of ten Tusscher et al are also introduced into our model. The results show that the endocardial and midmyocardial cells AP have little...
In this paper, we present a simulation study of transmural cellular electromechanical properties in heart failure based on a integrated and refined heart cell model of Luo-Rudy II model and modified Hunter-McCullochter Keurs mechanical model. The results show that prolonged action potential duration (APD) and APD rate-adaptation are more obviously transmurally heterogeneous in heart failure than those...
Based on our previously developed electrical heart model, an electromechanical biventricular model, which couples the electrical property and mechanical property of the heart, was constructed and the right ventricular wall motion and deformation was simulated using this model. The model was developed on the basis of composite material theory and finite element method. The excitation propagation was...
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