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Listar por autor "Liberos Mascarell, Alejandro"

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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 (Universitat Politècnica de València, 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 ...
Automatic quality electrogram assessment improves phase-based reentrant activity identification in atrial fibrillation

Costoya-Sánchez, Alejandro; Climent, Andreu M.; Hernández-Romero, Ismael; Liberos Mascarell, Alejandro; Fernández-Avilés, Francisco; Narayan, Sanjiv M.; Atienza, Felipe; Guillem Sánchez, María Salud; RODRIGO BORT, MIGUEL (Elsevier, 2020-02)

[EN] Identification of reentrant activity driving atrial fibrillation (AF) is increasingly important to ablative therapies. The goal of this work is to study how the automatically-classified quality of the electrograms ...
Automatic Quality Electrogram Assessment Improves Reentrant Activity Identification in Atrial Fibrillation

Costoya-Sánchez, Alejandro; Climent, Andreu M.; Hernández-Romero, Ismael; Liberos, Alejandro; Fernández-Avilés, Francisco; Narayan, Sanjiv M.; Atienza, Felipe; Guillem Sánchez, María Salud; Rodrigo, Miguel (IEEE, 2019-09-11)

[EN] Location of reentrant electrical activity responsible for driving atrial fibrillation (AF) is key to ablative therapies. The aim of this work is to study the effect of the quality of the electrograms (EGMs) used for ...
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 simulaciones de fibrilación auricular ante la inclusión de características anatómicamente relevantes

Barrios Álvarez de Arcaya, Javier (Universitat Politècnica de València, 2024-02-19)

[ES] La fibrilación auricular es una de las principales causas de muerte en los países desarrollados, con una proyección hacia el aumento de casos a lo largo de los años. El problema de este tipo de arritmia es que los ...
Desarrollo de una solución para la monitorización y el control remoto de procesos industriales

Liberos Mascarell, Alejandro (Universitat Politècnica de València, 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 ...
Effects of Geometry in Atrial Fibrillation Markers Obtained With Electrocardiographic Imaging

Molero-Alabau, Rubén; Climent, Andreu M.; Hernández-Romero, Ismael; Liberos, Alejandro; Fernández-Avilés, Francisco; Atienza, Felipe; Guillem Sánchez, María Salud; Rodrigo, Miguel (IEEE, 2019-09-11)

[EN] Electrocardiographic imaging (ECGI) can characterise cardiac pathologies such as atrial fibrillation (AF) through specific markers based on frequency or phase analysis. In this study, the effect of the geometry of ...
Estimación no invasiva de la presencia de canales de conducción lenta mediante medidas electrocardiográficas en un modelo computacional cardiaco post-infarto

Wang, Xinyue (Universitat Politècnica de València, 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 (Universitat Politècnica de València, 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 ...
From specialized to core course in Telecommunications degree: Experiences from digital electronic design and verification

Martínez Millana, Antonio; Liberos Mascarell, Alejandro; Monzó Ferrer, José María; Martínez Peiró, Marcos Antonio; Martínez Pérez, Jorge Daniel; Gadea Gironés, Rafael (Editorial Universitat Politècnica de València, 2020-04-10)

[EN] The European Higher Education Area (EHEA) defines the competences for professional practice of a Telecommunications Engineer. The School of Telecommunication Engineering of the Universitat Politècnica de ...
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 (Universitat Politècnica de València, 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 ...
Non-Invasive Electrophysiological Mapping Entropy Predicts Atrial Fibrillation Ablation Efficacy Better Than Clinical Characteristics

De la Nava, A. S.; Fabregat, M. C.; Rodrigo, M.; Hernández, I.; Liberos, A.; Fernández-Avilés, F.; Guillem Sánchez, María Salud; Atienza, F.; Climent, Andreu M. (IEEE, 2019-09-11)

[EN] Success rate of atrial fibrillation (AF) ablation remains far from satisfactory. In this study, a 6 months AF freedom predictive model based on Fuzzy Entropy of non-invasive body surface potential maps is compared ...
Non-invasive Spatial Mapping of Frequencies in Atrial Fibrillation: Correlation With Contact Mapping

Rodrigo, Miguel; Waddell, Kian; Magee, Sarah; Rogers, Albert J.; Alhusseini, Mahmood; Hernández-Romero, Ismael; Costoya-Sánchez, Alejandro; Liberos, Alejandro; Narayan, Sanjiv M. (Frontiers Media SA, 2021-01-06)

[EN] Introduction: Regional differences in activation rates may contribute to the electrical substrates that maintain atrial fibrillation (AF), and estimating them non-invasively may help guide ablation or select anti-arrhythmic ...
Noninvasive Assessment of Complexity of Atrial Fibrillation Correlation With Contact Mapping and Impact of Ablation

RODRIGO BORT, MIGUEL; Martínez Climent, Batiste Andreu; Hernández-Romero, Ismael; Liberos Mascarell, Alejandro; Baykaner, Tina; Rogers, Albert J.; Alhusseini, Mahmood; Wang, Paul J.; Fernández-Avilés, Francisco; Guillem Sánchez, María Salud; Narayan, Sanjiv M.; Atienza, Felipe (Ovid Technologies Wolters Kluwer -American Heart Association, 2020-03)

[EN] Background: It is difficult to noninvasively phenotype atrial fibrillation (AF) in a way that reflects clinical end points such as response to therapy. We set out to map electrical patterns of disorganization and ...