19 Result(s)
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Martyn P. Nash
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Open AccessEvaluation of left ventricular filling pressure by echocardiography in patients with atrial fibrillation
Echocardiography is widely used to evaluate left ventricular (LV) diastolic function in patients suspected of heart failure. For patients in sinus rhythm, a combination of several echocardiographic parameters ...
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Open AccessPublisher Correction: Correcting bias in cardiac geometries derived from multimodal images using spatiotemporal map**
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Open AccessSuper-resolution 4D flow MRI to quantify aortic regurgitation using computational fluid dynamics and deep learning
Changes in cardiovascular hemodynamics are closely related to the development of aortic regurgitation (AR), a type of valvular heart disease. Metrics derived from blood flows are used to indicate AR onset and ...
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Open AccessCorrecting bias in cardiac geometries derived from multimodal images using spatiotemporal map**
Cardiovascular imaging studies provide a multitude of structural and functional data to better understand disease mechanisms. While pooling data across studies enables more powerful and broader applications, p...
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Open AccessPassive myocardial mechanical properties: meaning, measurement, models
Passive mechanical tissue properties are major determinants of myocardial contraction and relaxation and, thus, shape cardiac function. Tightly regulated, dynamically adapting throughout life, and affecting a ...
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The effect of camera settings on image noise and accuracy of subpixel image registration
Estimating the accuracy of subpixel image registration algorithms in practical experiments is important, yet challenging in many applications. The accuracy of these algorithms in camera-based systems is influe...
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Surface deformation tracking and modelling of soft materials
Many computer vision algorithms have been presented to track surface deformations, but few have provided a direct comparison of measurements with other stereoscopic approaches and physics-based models. We have...
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Open AccessNon-contact Quantification of Jugular Venous Pulse Waveforms from Skin Displacements
The jugular venous (JV) pressure waveform is a non-invasive, proven indicator of cardiovascular disease. Conventional clinical methods for assessing these waveforms are often overlooked because they require sp...
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Left Ventricular Diastolic Myocardial Stiffness and End-Diastolic Myofibre Stress in Human Heart Failure Using Personalised Biomechanical Analysis
Understanding the aetiology of heart failure with preserved (HFpEF) and reduced (HFrEF) ejection fraction requires knowledge of biomechanical factors such as diastolic myocardial stiffness and stress. Cine CMR...
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Open AccessSpatio-temporal Organization During Ventricular Fibrillation in the Human Heart
In this paper, we present a novel approach to quantify the spatio-temporal organization of electrical activation during human ventricular fibrillation (VF). We propose three different methods based on correlat...
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Modelling Cardiac Tissue Growth and Remodelling
Cardiac growth and remodelling are key phenomena influencing the physiological performance of the heart and progression of various cardiac diseases. Our basic knowledge of the characteristics of cardiac growth...
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Open AccessQuantifying passive myocardial stiffness and wall stress in heart failure patients using personalized ventricular mechanics
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Model-based identification of motion sensor placement for tracking retraction and elongation of the tongue
Electromagnetic articulography (EMA) is designed to track facial and tongue movements. In practice, the EMA sensors for tracking the movement of the tongue’s surface are placed heuristically. No recommendation...
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Open AccessInvestigating heart failure mechanics using personalised human biophysical models
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Predicting lymphatic drainage patterns and primary tumour location in patients with breast cancer
Detailed knowledge of the lymphatic drainage of the breast is limited. Lymphoscintigraphy is a technique used during breast cancer treatment to accurately map patterns of lymphatic drainage from the primary tu...
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Estimating material parameters of a structurally based constitutive relation for skin mechanics
This paper presents a structurally based modeling framework to characterize the structure–function relation in skin tissues, based upon biaxial tensile experiments performed in vitro on porcine skin. Equi-axia...
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Anisotropic effects of the levator ani muscle during childbirth
Pelvic floor dysfunction and pelvic organ prolapse have been associated with damage to the levator ani (LA) muscle, but the exact mechanisms linking them remain unknown. It has been postulated that factors suc...
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Open AccessInteractive biventricular modeling tools for clinical cardiac image analysis
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The SARD variety of multifractality of ventricular epicardial map** during ischemia
We have analyzed cardiac ischemia-reperfusion in an animal model using epicardial electropotential map**. We investigated the relationship between ischemia and variability of multifractality in epicardial el...
