Electrocardiogram signal generation using electrical model of cardiac cell: application in cardiac ischemia

Fallahi, Alireza; Khorram, Hamidreza Ghanbari; Kokabi, Alireza

doi:10.1080/03091902.2019.1645221

Cited by 9 publications

(4 citation statements)

References 14 publications

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“…Density functional theory (DFT) along with the local density approximation as implemented in the SIESTA code to calculate electronic bandstructure [51][52][53][54][55]. A cut of energy equals to 400 Ry and Monkhorst-pack grid of 18 × 18 × 1 k-points was used.…”

Section: Computational Detailsmentioning

confidence: 99%

Anti-reflective MX (M = Sc and Y; X = N, P, As, Sb and Bi) monolayers: structural, electronic and optical study

Babaee Touski,

Hosseini,

Kokabi

2023

Semicond. Sci. Technol.

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In this paper, the structural, electronic and optical properties of tetragonal binary monolayers of MX (M = Sc, Y; X = As, Bi, N, P, Sb) are investigated using the density functional theory. The optical study demonstrates that ScN and YN compounds are promising anti-reflective materials. All compounds are found to be semiconductors with a bandgap in the range of 0.45–1.8 eV. Among these compounds, ScN and YN have a direct bandgap at Γ-point while the remainings demonstrate an indirect bandgap. It is found that the structural anisotropy controls the anisotropy of the electronic properties. The biaxial strain analysis shows that YBi monolayer has the maximum linear strain bandgap dependency, making it a suitable candidate for pressure sensing applications. The ScN and YN monolayers demonstrate a phase transition from semiconductive to Dirac semi-metallic characteristics at large compressive strains.

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Section: Computational Detailsmentioning

confidence: 99%

Anti-reflective MX (M = Sc and Y; X = N, P, As, Sb and Bi) monolayers: structural, electronic and optical study

Babaee Touski,

Hosseini,

Kokabi

2023

Semicond. Sci. Technol.

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“…Частота выявленной депрессии сегмента ST составила 48%, элевации -52%. Величина полученных амплитуд и частота возникновения депрессий и элеваций сегмента ST не противоречила существующим математическим и биофизическим моделям ишемии миокарда и данным экспериментальных исследований [10][11][12].…”

Section: результатыunclassified

“…Решение о выполнении баллонной ангиопластики остается сложным. С одной стороны, необходимо помнить о недооценке сужения по данным ангиографии как ограничении метода, а с другой -о риске диссекции с последующим необходимым переходом на двухстентовую методику ЧКВ, что увеличивает риск рестеноза БВ в отдаленном периоде [12,13].…”

Section: результатыunclassified

Implementation of electrocardiography from the coronary sinus in interventional treatment of coronary arteries: two-year experience of clinical application of the method

Шевченко

Ermakov

Марчак

2021

jour

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The aim of this study was to summarize, systematize, and extend analysis of data of two-year clinical use of intracardiac ECG (ECG-CS) in patients with coronary artery disease.Material and methods. 131 patients with coronary artery disease who underwent a planned coronary stenting were included in a prospective study from 2018 till 2020 . Ischemia was monitored with the use of electrophysiological recording system with the following settings: combining electrodes into fi ve cathode-anode pairs with a frequency range of 30–500 Hz, signal cut-off of 1 cm, and an amplitude of 0.3 mV/cm.Results. According to the ROC-analysis, the sensitivity of the ECG-СS method in case of ST segment depression was 79.5%, the specifi city was 100%; with ST segment elevation — 83% with a specifi city of 100%, according to data obtained in 88 patients with single-vessel disease of the coronary arteries (CA). Out of 43 patients with coronary artery disease, compromise of the diagonal branch and signifi cant ischemic dynamics (p < 0.05) in the intracardiac lead CS 3–4 after stent placement in the ADA according to ECG-CS was observed in 11 (25.6%) patients, in 9 (20.9%) of which successful provisional stenting was performed, and 2 (4 .6%) patients required implantation of the second stent.Conclusion. ECG-CS is a promising method for detecting myocardial ischemia in patients with coronary artery disease and allows to optimize intervention in the area of coronary artery bifurcation.

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“…The acceleration phenomenon was achieved by a connected system created by two models with identical-period temporal waveforms but varied plateau durations. Fallahi et al [7] demonstrated cardiac action potential generation modeling by the standard electric model of cardiac cells developed by Maeda et al [6] and an ECG signalproducing mechanism in the heart. The presented model parameters were varied to simulate the cardiac ischemic signal.…”

Section: Introductionmentioning

confidence: 99%

Forward problem of electrocardiography based on cardiac source vector orientations

Bhat,

2024

Biomed. Phys. Eng. Express

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To localize the unusual cardiac activities non-invasively, one has to build a prior forwardmodel that relates the heart, torso, and detectors. This model has to be constructed tomathematically relate the geometrical and functional activities of the heart. Several methods are available to model the prior sources in the forward problem, which results in the lead field matrix generation. In the conventional technique, the lead field assumed the fixed prior sources, and the source vector orientations were presumed to be parallel to the detector plane with the unit strength in all directions. However, the anomalies cannot always be expected tooccur in the same location and orientation, leading to misinterpretation and misdiagnosis. To overcome this, the work proposes a new forward model constructed using the VCG signals of the same subject. Furthermore, three transformation methods were used to extract VCG in constructing the time-varying lead field to steer to the orientation of the source rather than just reconstructing its activities in the inverse problem. In addition, the unit VCG loop of the acute ischemia patient was extracted to observe the changes compared to the normal subject. The abnormality condition was achieved by reducing the depolarization time by 15ms. The results involving the unit vectors of VCG demonstrated the anisotropic nature of cardiac source orientations, providing information about the heart's electrical activity.

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Electrocardiogram signal generation using electrical model of cardiac cell: application in cardiac ischemia

Cited by 9 publications

References 14 publications

Anti-reflective MX (M = Sc and Y; X = N, P, As, Sb and Bi) monolayers: structural, electronic and optical study

Anti-reflective MX (M = Sc and Y; X = N, P, As, Sb and Bi) monolayers: structural, electronic and optical study

Implementation of electrocardiography from the coronary sinus in interventional treatment of coronary arteries: two-year experience of clinical application of the method

Forward problem of electrocardiography based on cardiac source vector orientations

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