Search Results - "Nash, Martyn P."
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Correcting bias in cardiac geometries derived from multimodal images using spatiotemporal mapping
Published in Scientific reports (19-05-2023)“…Cardiovascular imaging studies provide a multitude of structural and functional data to better understand disease mechanisms. While pooling data across studies…”
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Electromechanical model of excitable tissue to study reentrant cardiac arrhythmias
Published in Progress in biophysics and molecular biology (01-06-2004)“…We introduce the concept of a contracting excitable medium that is capable of conducting non-linear waves of excitation that in turn initiate contraction…”
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Publisher Correction: Correcting bias in cardiac geometries derived from multimodal images using spatiotemporal mapping
Published in Scientific reports (21-08-2023)Get full text
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The inspection paradox: An important consideration in the evaluation of rotor lifetimes in cardiac fibrillation
Published in Frontiers in physiology (06-09-2022)“…Renewal theory is a statistical approach to model the formation and destruction of phase singularities (PS), which occur at the pivots of spiral waves. A…”
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Effect of global cardiac ischemia on human ventricular fibrillation: insights from a multi-scale mechanistic model of the human heart
Published in PLoS computational biology (01-11-2014)“…Acute regional ischemia in the heart can lead to cardiac arrhythmias such as ventricular fibrillation (VF), which in turn compromise cardiac output and result…”
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Efficient Ventricular Parameter Estimation Using AI-Surrogate Models
Published in Frontiers in physiology (14-10-2021)“…The onset and progression of pathological heart conditions, such as cardiomyopathy or heart failure, affect its mechanical behaviour due to the remodelling of…”
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Automated model calibration with parallel MCMC: Applications for a cardiovascular system model
Published in Frontiers in physiology (09-11-2022)“…Computational physiological models continue to increase in complexity, however, the task of efficiently calibrating the model to available clinical data…”
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Evidence for multiple mechanisms in human ventricular fibrillation
Published in Circulation (New York, N.Y.) (08-08-2006)“…The mechanisms that sustain ventricular fibrillation (VF) in the human heart remain unclear. Experimental models have demonstrated either a periodic source…”
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Roadmap for an imaging and modelling paediatric study in rural NZ
Published in Frontiers in physiology (10-03-2023)“…Our study methodology is motivated from three disparate needs: one, imaging studies have existed in silo and study organs but not across organ systems; two,…”
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Characterizing levator-ani muscle stiffness pre- and post-childbirth in European and Polynesian women in New Zealand: a pilot study
Published in Acta obstetricia et gynecologica Scandinavica (01-10-2017)“…The influence of levator-ani muscles on second-stage labor is poorly understood. The ability of these muscles to stretch without damage may affect birth…”
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Insights From Computational Modeling Into the Contribution of Mechano-Calcium Feedback on the Cardiac End-Systolic Force-Length Relationship
Published in Frontiers in physiology (29-05-2020)“…In experimental studies on cardiac tissue, the end-systolic force-length relation (ESFLR) has been shown to depend on the mode of contraction: isometric or…”
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Evaluation of left ventricular filling pressure by echocardiography in patients with atrial fibrillation
Published in Echo research and practice (03-06-2024)“…Echocardiography is widely used to evaluate left ventricular (LV) diastolic function in patients suspected of heart failure. For patients in sinus rhythm, a…”
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Ventricular fibrillation: combined myocardial substrate and Purkinje ablation
Published in European heart journal (21-03-2022)Get full text
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MITEA: A dataset for machine learning segmentation of the left ventricle in 3D echocardiography using subject-specific labels from cardiac magnetic resonance imaging
Published in Frontiers in cardiovascular medicine (10-01-2023)“…Segmentation of the left ventricle (LV) in echocardiography is an important task for the quantification of volume and mass in heart disease. Continuing…”
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Systematic Comparison of Left Ventricular Geometry Between 3D-Echocardiography and Cardiac Magnetic Resonance Imaging
Published in Frontiers in cardiovascular medicine (20-09-2021)“…Left ventricular (LV) volumes estimated using three-dimensional echocardiography (3D-echo) have been reported to be smaller than those measured using cardiac…”
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A discrete model to study reaction-diffusion-mechanics systems
Published in PloS one (11-07-2011)“…This article introduces a discrete reaction-diffusion-mechanics (dRDM) model to study the effects of deformation on reaction-diffusion (RD) processes. The dRDM…”
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Analysis of Cardiac Fibrillation Using Phase Mapping
Published in Cardiac electrophysiology clinics (01-03-2015)“…The sequence of myocardial electrical activation during fibrillation is complex and changes with each cycle. Phase analysis represents the electrical…”
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ECG signal classification for the detection of cardiac arrhythmias using a convolutional recurrent neural network
Published in Physiological measurement (24-09-2018)“…The electrocardiogram (ECG) provides an effective, non-invasive approach for clinical diagnosis in patients with cardiac diseases such as atrial fibrillation…”
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Whole heart action potential duration restitution properties in cardiac patients: a combined clinical and modelling study
Published in Experimental physiology (01-03-2006)“…Steep action potential duration (APD) restitution has been shown to facilitate wavebreak and ventricular fibrillation. The global APD restitution properties in…”
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Creating Individual-specific Biomechanical Models of the Breast for Medical Image Analysis
Published in Academic radiology (01-11-2008)“…Rationale and Objectives Anatomically realistic biomechanical models of the breast potentially provide a reliable way of mapping tissue locations across…”
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