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Listar por palabra clave "Atrial Fibrillation"

Mostrando ítems 1-14 de 14

Central tendency measure and wavelet transform combined in the non-invasive analysis of atrial fibrillation recordings

Alcaraz, Raúl; Rieta Ibañez, José Joaquín (BioMed Central, 2012-08-09)

Background Atrial fibrillation (AF) is the most common supraventricular arrhythmia in the clinical practice, being the subject of intensive research. Methods The present work introduces two different Wavelet Transform ...
Combined Nonlinear Analysis of Atrial and Ventricular Series for Automated Screening of Atrial Fibrillation

Rodenas, Juan; Garcia, Manuel; Alcaraz, Raul; Rieta, J. J. (John Wiley & Sons, 2017)

[EN] Atrial fibrillation (AF) is the most common cardiac arrhythmia in clinical practice. It often starts with asymptomatic and short episodes, which are difficult to detect without the assistance of automatic monitoring ...
Computational simulations of the effects of the V17M missense mutation on atrial electrical activity

Belletti, Rebecca; Martínez Mateu, L.; Romero Pérez, Lucia; Saiz Rodríguez, Francisco Javier (Grupo de Técnicas Ópticas Aplicadas, Universidad de Cantabria, 2019-11-29)

[EN] Atrial fibrillation is a cardiac arrhythmia responsible for disorganized electrical activity of the upper chambers of the heart. Recently genetic mutations have been associated to episodes of atrial fibrillation in ...
Deep Learning Detection of Corrupted Segments in Recordings from Wearable Devices to Improve Atrial Fibrillation Screening

Huerta, Álvaro; Martínez-Rodrigo, Arturo; Arias, Miguel A.; Langley, Phillip; Rieta, J J; Alcaraz, Raúl (IEEE, 2020-10-30)

[EN] Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia in clinical practice. It is associated with an increased risk of cardiovascular events, but its early detection is an unresolved challenge. For ...
Desarrollo de un método para la estimación de la ubicación de lugares mantenedores de la fibrilación auricular mediante problema inverso de la electrocardiografía mediante análisis de fase y modulaciones en fase y frecuencia

Ballester Hoyo, Estrella del Mar (Universitat Politècnica de València, 2021-01-14)

[ES] La Fibrilación Auricular (FA) es la arritmia más frecuente observada en clínica. En casos en los que esta patología no revierte debido a la actividad reentrante se suele recurrir al tratamiento por ablación mediante ...
Heterogeneous effects of fibroblast-myocyte coupling in different regions of the human atria under conditions of atrial fibrillation

Sánchez Arciniegas, Jorge Patricio; Martínez Mateu, Laura; Gómez García, Juan Francisco; Romero Pérez, Lucia; Saiz Rodríguez, Francisco Javier; Trénor Gomis, Beatriz Ana (Universitat Politècnica de València, 2019-05-13)

[EN] Myofibroblasts differ from fibroblasts in that they develop contractile proteins and exhibit a more depolarized resting membrane potential (Salvarani et al., 2017) and greater membrane capacitance (Sridhar et al., ...
Impedance measurement to assess epicardial fat prior to RF intraoperative cardiac ablation: a feasibility study using a computer model

González-Suárez, Ana; Hornero, Fernando; Berjano, Enrique (IOP Publishing, 2010-11)

[EN] Radiofrequency (RF) cardiac ablation is used to treat certain types of arrhythmias. In the epicardial approach, efficacy of RF ablation is uncertain due to the presence of epicardial adipose tissue interposed between ...
In vitro Evaluation of Potential Left Atrium Thrombosis Risks by Different Phenotypes of Left Atrial Appendage

Gual Ramon, Jaume (Universitat Politècnica de València, 2022-10-20)

[ES] La fibrilación auricular, entre otros ritmos cardiacos fisiológicos y patológicos, causa un comportamiento anormal del flujo sanguíneo en la aurícula izquierda (LA), especialmente en la orejuela o apéndice izquierdo ...
Optimización del algoritmo de localización automática de la anatomía auricular dentro del torso utilizando la curvatura de la curva-L para Imagen Electrocardiográfica

Gisbert Climent, Víctor (Universitat Politècnica de València, 2018-10-04)

La cartografía eléctrica no-invasiva (ECGI) permite identificar las regiones auriculares causantes de la fibrilación auricular y por tanto susceptibles de ser ablacionadas. Sin embargo, para una correcta reconstrucción de ...
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 ...
Response to the article by Sungnoon et al. "Atrial electrophysiological property analysis by sample entropy and atrial fibrillatory rate with cardiac autonomic derangements in acute ischemic stroke with atrial fibrillation"

Alcaraz, Raul; Rieta, J J (ASEAN Neurological Association, 2014-09)
Review: Application of non-linear methods in the study of atrial fibrillation organization

Alcaraz, Raúl; Rieta, J J (National Cheng Kung University, 2013)

Nonlinear analysis has emerged as a novel methodology for the processing of physiological time series over the past few decades because biological systems and processes are inherently complex, nonlinear, and non-stationary. ...
Role of atrial tissue remodeling on rotor dynamics an in vitro study

Climent, A.M.; Guillem Sánchez, María Salud; Fuentes, L.; Lee, P.; Bollensdorff, C.; Fernandez-Santos, M.E.; Suarez-Sancho, S.; Sanz-Ruiz, R.; Sanchez, P.L.; Atienza, F.; Fernandez-Aviles, F. (American Physiological Society, 2015-12-01)

The objective of this article is to present an in vitro model of atrial cardiac tissue that could serve to study the mechanisms of remodeling related to atrial fibrillation (AF). We analyze the modification on gene expression ...
Time Variability of P-wave Features from the Preoperative Electrocardiogram Predicts Recurrence After Catheter Cryoablation of Atrial Fibrillation

Ruiz, Antonio; Arias, Miguel A.; Puchol, Alberto; Pachón, Marta I.; Rieta, J J; Alcaraz, Raúl (IEEE, 2020-10-30)

[EN] Pulmonary vein isolation is nowadays the cornerstone for the treatment of paroxysmal atrial fibrillation (AF). However, its success rate is not as high as clinically desirable, and repeated procedures are often required. ...