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Browsing by Author "Liberos Mascarell, Alejandro"

Now showing items 1-16 of 16

Adaptación para multiples GPU de un simulador de actividad eléctrica en el corazón

García Mollá, Víctor Manuel; Vidal Maciá, Antonio Manuel; Liberos Mascarell, Alejandro; Climent, Andreu M. (Universidad de las Ciencias Informaticas, 2013-12-10)

[EN] The simulation of the electrical activity of the heart is calculated by solving a large system of ordinary differential equations; this takes an enormous amount of computation time. In recent years graphics processing ...
Adaptive step ODE algorithms for the 3D simulation of electric heart activity with graphics processing units

García Mollá, Víctor Manuel; Liberos Mascarell, Alejandro; Vidal Maciá, Antonio Manuel; Guillem Sánchez, María Salud; Millet Roig, José; González Salvador, Alberto; Martínez Zaldívar, Francisco José; Climent, Andreu M. (Elsevier, 2014-02)

In this paper we studied the implementation and performance of adaptive step methods for large systems of ordinary differential equations systems in graphics processing units, focusing on the simulation of three-dimensional ...
Análisis Comparativo de la Familia xRIO de National Instruments para el Registro Multicanal de Potenciales Cardíacos

Liberos Mascarell, Alejandro (2011-11-29)

El objetivo de este trabajo es describir y testear una novedosa arquitectura para el registro multicanal de potenciales cardíacos basada en LabVIEW: la Arquitectura Reconfigurable para el Mapeo Eléctrico (RAEM). La ...
Balance between sodium and calcium currents underlying chronic atrial fibrillation termination: An in silico intersubject variability study.

Liberos Mascarell, Alejandro; Bueno-Orovio, Alfonso; Rodrigo Bort, Miguel; Ravens, Ursula; Hernández-Romero, Ismael; Fernández-Avilés, Francisco; Guillem Sánchez, María Salud; Rodríguez López, Blanca; Climent, Andreu M. (Elsevier, 2016-12)

BACKGROUND Atrial remodeling as a result of long-standing persistent atrial fibrillation (AF) induces substrate modifications that lead to different perpetuation mechanisms than in paroxysmal AF and a reduction in the ...
Body surface localization of left and right atrial high-frequency rotors in atrial fibrillation patients: A clinical-computational study

Rodrigo Bort, Miguel; Guillem Sánchez, María Salud; Climent, Andreu M.; Pedrón Torrecilla, Jorge; Liberos Mascarell, Alejandro; Millet Roig, José; Fernandez-Aviles, Francisco; Atienza, Felipe; Berenfeld, Omer (Elsevier, 2014-09)

Background: Ablation is an effective therapy in atrial fibrillation (AF) patients in which an electrical driver can be identified. Objective: The aim of this study is to present and discuss a novel and strictly non-invasive ...
Desarrollo de una solución para la monitorización y el control remoto de procesos industriales

Liberos Mascarell, Alejandro (2017-07-11)

Nuestro proyecto consiste en la implementación del interfaz de usuario en PDA sobre un sistema de supervisión industrial. La empresa ha elegido el parque solar fotovoltaico de Olmedilla de Alarcón para realizar esta ...
Estimación no invasiva de la presencia de canales de conducción lenta mediante medidas electrocardiográficas en un modelo computacional cardiaco post-infarto

Wang, Xinyue (2018-10-01)

Los canales de conducción lenta en pacientes que han sufrido infarto de miocardio constituyen un sustrato proarrítimo que puede provocar arritmias ventriculares letales. Hemos demostrado en el pasado que los canales de ...
Evaluación de la tecnología ECGi para la caracterización de tejido ventricular

Lorente Rogel, Ángel (2019-08-01)

[ES] La asincronía cardíaca tiene altas implicaciones tanto en la pérdida de capacidad del corazón para trabajar como una bomba como en un incremento del riesgo de sufrir una taquiarritmia como es la taquicardia o la ...
Highest dominant frequency and rotor positions are robust markers of driver location during noninvasive mapping of atrial fibrillation: A computational study

RODRIGO BORT, MIGUEL; Climent, Andreu M.; Liberos Mascarell, Alejandro; Fernandez-Aviles, Francisco; Berenfeld, Omer; Atienza, Felipe; Guillem Sánchez, María Salud (Elsevier, 2017-08)

[EN] BACKGROUND Dominant frequency (DF) and rotor mapping have been proposed as noninvasive techniques to guide localization of drivers maintaining atrial fibrillation (AF). OBJECTIVE The purpose of this study was to ...
Identification of Dominant Excitation Patterns and Sources of Atrial Fibrillation by Causality Analysis

Rodrigo Bort, Miguel; Climent, A.M.; Liberos Mascarell, Alejandro; Calvo, D.; Fernandez-Aviles, F.; Berenfeld, O.; Atienza, F.; Guillem, M.S (Springer Verlag (Germany), 2016-08)

Burden of atrial fibrillation (AF) can be reduced by ablation of sources of electrical impulses driving AF but driver identification is still challenging. This study presents a new methodology based on causality analysis ...
Mathematical modeling approaches for the diagnosis and treatment of reentrant atrial tachyarrhythmias

Liberos Mascarell, Alejandro (2016-04-05)

[EN] Atrial tachyarrhythmias present a high prevalence in the developed world, and several studies predict that in the coming decades it will be increased. Micro or macro-reentrant mechanisms of the electrical wavefronts ...
Minimal configuration of body surface potential mapping for discrimination of left versus right dominant frequencies during atrial fibrillation

RODRIGO BORT, MIGUEL; Climent Martínez, Batiste Andreu; Liberos Mascarell, Alejandro; Fernández-Avilés, Francisco; Atienza, Felipe; Guillem Sánchez, María Salud; Berenfeld, Omer (Blackwell Publishing, 2017-08)

[EN] Background: Ablation of drivers maintaining atrial fibrillation (AF) has been demonstrated as an effective therapy. Drivers in the form of rapidly activated atrial regions can be noninvasively localized to either left ...
Regularization Techniques for ECG Imaging during Atrial Fibrillation: A Computational Study

Figuera C; Suárez Gutiérrez V; Hernández-Romero, Ismael; Rodrigo Bort, Miguel; Liberos Mascarell, Alejandro; Atienza, F.; Guillem Sánchez, María Salud; Barquero-Pérez O; Climent, A.M.; Alonso Atienza, Felipe (Frontiers Media, 2016-10-14)

The inverse problem of electrocardiography is usually analyzed during stationary rhythms. However, the performance of the regularization methods under fibrillatory conditions has not been fully studied. In this work, we ...
Resolución del problema inverso mediante GPU para Imágen Electrocardiográfica

Paracuellos de los Santos, Diego (2019-10-15)

[ES] La Imagen Electrocardiográfica (ECGI) permite estimar los potenciales en la superficie epicárdica a partir de registros electrocardiográficos de superficie. Para poder realizar la reconstrucción de los potenciales ...
Solving Inaccuracies in Anatomical Models for Electrocardiographic Inverse Problem Resolution by Maximizing Reconstruction Quality

Rodrigo Bort, Miguel; Climent, Andreu M.; Liberos Mascarell, Alejandro; Hernández-Romero, Ismael; Arenal, A.; Bermejo, Javier; Fernández-Avilés, Francisco; Atienza, Felipe; Guillem Sánchez, María Salud (Institute of Electrical and Electronics Engineers, 2018-03)

[EN] Electrocardiographic Imaging has become an increasingly used technique for non-invasive diagnosis of cardiac arrhythmias, although the need for medical imaging technology to determine the anatomy hinders its introduction ...
Technical Considerations on Phase Mapping for Identification of Atrial Reentrant Activity in Direct- and Inverse-Computed Electrograms

RODRIGO BORT, MIGUEL; Martínez Climent, Andreu; Liberos Mascarell, Alejandro; Fernández-Avilés, Francisco; Berenfeld, Omer; Atienza, Felipe; Guillem Sánchez, María Salud (Ovid Technologies Wolters Kluwer -American Heart Association, 2017-09)

[EN] [Background] Phase mapping has become a broadly used technique to identify atrial reentrant circuits for ablative therapy guidance. This work studies the phase mapping process and how the signal nature and its filtering ...