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Browsing by Subject "Electrocardiography"

Now showing items 1-20 of 20

Active concentric ring electrode for non-invasive detection of intestinal myoelectric signals

Prats Boluda, Gema; Garcia Casado, Francisco Javier; Martínez De Juan, José Luís; Ye Lin, Yiyao (Elsevier, 2011-05)

[EN] Although the surface electroenterogram (EEnG) is a weak signal contaminated by strong physiological interference, such as ECG and respiration, abdominal surface recordings of the EEnG could provide a non-invasive ...
Assessment of non-invasive time and frequency atrial fibrillation organization markers with unipolar atrial electrograms

Alcaraz, Raúl; Hornero, Fernando; Rieta, J J (IOP Publishing: Hybrid Open Access, 2011-01)

The standard electrocardiogram (ECG) is the most common non-invasive way to study atrial fibrillation (AF). In this respect, previous works have shown that the surface lead V 1 reflects mainly the dominant atrial frequency ...
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 ...
Classification of paroxysmal and persistent atrial fibrillation in ambulatory ECG recordings

Alcaraz, Raúl; Sandberg, Frida; Sornmo, Leif; Rieta Ibañez, José Joaquín (Institute of Electrical and Electronics Engineers (IEEE), 2011-05)

The problem of classifying short atrial fibrillatory segments in ambulatory ECG recordings as being either paroxysmal or persistent is addressed by investigating a robust approach to signal characterization. The method ...
Classification of persistent and long-standing persistent atrial fibrillation by means of surface electrocardiograms

Ortigosa, Nuria; Fernández, Carmen; Galbis, Antonio; Cano, Oscar (De Gruyter, 2016-02)

Atrial fibrillation, which is the most common cardiac arrhythmia, is typically classified into four clinical subtypes: paroxysmal, persistent, long-standing persistent and permanent. The ability to distinguish between them ...
Comparative study of approximate entropy and sample entropy robustness to spikes

Molina Picó, Antonio; Cuesta Frau, David; Riobo Aboy, Pedro Mateo; Crespo Sánchez, María Cristina; Miró Martínez, Pau; Oltra Crespo, Sandra (Elsevier, 2011-10)

Objective: There is an ongoing research effort devoted to characterize the signal regularity metrics approximate entropy (ApEn) and sample entropy (SampEn) in order to better interpret their results in the context of ...
Electrocardiographic reference values for healthy Netherland Dwarf rabbits and the influence of body position, age and gender

Chapel, J. M.; Castillo, C.; Hernández, J.; Cipone, M.; Benedito, J. L. (Universitat Politècnica de València, 2017-12-28)

[EN] The aim of this study was to provide reference values for a single, popular breed of pet rabbit. Moreover, additional objectives were to determine whether sex, body position or age alter Netherland Dwarf rabbit ...
Estudio comparativo sobre los métodos de registro electrocardiográfico no estándar que optimizan la estimación de organización en fibrilación auricular

Martínez Gomar, José (2013-02-19)

[ES] Varios grupos de investigación han propuesto distintos protocolos de registro electrocardiográfico de superficie no estándar para cuantificar de manera específica señales de Fibrilación Auricular (FA). Por lo tanto, ...
Evaluation of Bipolar, Tripolar, and Quadripolar Laplacian Estimates of Electrocardiogram via Concentric Ring Electrodes

Garcia-Casado, Javier; Ye Lin, Yiyao; Prats-Boluda, Gema; Makeyev, Oleksandr (MDPI AG, 2019-09-01)

[EN] Surface Laplacian estimates via concentric ring electrodes (CREs) have proven to enhance spatial resolution compared to conventional disc electrodes, which is of great importance for P-wave analysis. In this study, ...
High-Bandpass Filters in Electrocardiography: Source of Error in the Interpretation of the ST Segment

Buendıa Fuentes, F.; Arnau Vives, M.A.; Arnau Vives, Antonio; Jiménez Jiménez, Yolanda; Rueda-Soriano, J.; Zorio-Grima,E .; Osa-Saez, A.; Martınez-Dolz, L. V.; Almenar-Bonet, L.; Palencia-Perez, M.A. (Hindawi Publishing Corporation, 2012)

Introduction. Artifactual variations in the ST segment may lead to confusion with acute coronary syndromes. Objective. To evaluate how the technical characteristics of the recording mode may distort the ST segment. Material ...
Interaction of Specialized Cardiac Conduction System With Antiarrhythmic Drugs: A Simulation Study

Dux-Santoy Hurtado, Lydia; Sebastián Aguilar, Rafael; Felix-Rodriguez, Jose; Ferrero De Loma-Osorio, José María; Saiz Rodríguez, Francisco Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2011)

[EN] The use of antiarrhythmic drugs is common to treat heart rhythm disorders. Computational modeling and simulation are promising tools that could be used to investigate the effects of specific drugs on cardiac ...
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 Volatile and Battery-Less Analog Recording of Physiological Signals Using a Low-Cost Device for Voice Signal Storage: A Feasibility Test

Sales Nebot, Laura; Berjano, Enrique (Springer Verlag (Germany), 2011)

The ChipCorder ® technology employs a non volatile analog recording technique based on EEPROM technology (i. e. although the signal is time-sampled, its analog voltage is stored in memory cells based on capacitors). This ...
Non-invasive Reconstruction of the Myocardial Electrical Activity from Body Surface Potential Recordings

Pedrón Torrecilla, Jorge (2015-11-30)

[EN] The behavior of the heart is governed by electrical currents generated in the myocardium, and therefore, the study of the cardiac electrical activity is essential for the diagnosis of cardiac diseases. The forward ...
Noninvasive location of reentrant propagation patterns in patients with atrial fibrillation

Rodrigo Bort, Miguel (2015-09-18)

[EN] Ablation is an effective therapy in atrial fibrillation (AF) patients in which an electrical driver can be identified. Several techniques for locating ablation targets have been proposed during the last years. The aim ...
Surface ECG organization time course analysis along onward episodes of paroxysmal atrial fibrillation

Alcaraz, Raul; Hornero, Fernando; Rieta, J J (Elsevier, 2011-07)

The complete understanding of the mechanisms leading to the initiation, maintenance and self-termination of atrial fibrillation (AF) still is an unsolved challenge for cardiac electrophysiology. Studies in which AF has ...
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 ...
Validating the Comparison Framework for the Finite Dimensions Model of Concentric Ring Electrodes Using Human Electrocardiogram Data

Makeyev, Oleksandr; Musngi, Mark; Moore, Larry; Ye Lin, Yiyao; Prats-Boluda, Gema; Garcia-Casado, Javier (MDPI AG, 2019-10-12)

[EN] While progress has been made in design optimization of concentric ring electrodes maximizing the accuracy of the surface Laplacian estimation, it was based exclusively on the negligible dimensions model of the electrode. ...
Validation and Opportunities of Electrocardiographic Imaging: From Technical chievements to Clinical Applications

Cluitmans, Matthijs; Brooks, D.; MacLeod, Rob S.; Dossel, Olaf; Guillem Sánchez, María Salud; van Dam, P.; Svehlikova, Jana; He, Bin; Sapp, John; Wang, Liwei; Bear, Laura (Frontiers Media SA, 2018-09-20)

[EN] Electrocardiographic imaging (ECGI) reconstructs the electrical activity of the heart from a dense array of body-surface electrocardiograms and a patient-specific heart-torso geometry. Depending on how it is formulated, ...
Ventricular Tachycardia and Early Fibrillation in Patients With Brugada Syndrome and Ischemic Cardiomyopathy Show Predictable Frequency-Phase Properties on the Precordial ECG Consistent With the Respective Arrhythmogenic Substrate

Calvo, David; Atienza, Felipe; Saiz Rodríguez, Francisco Javier; Martinez, Laura; Ávila, Pablo; Rubín, José; Herreros, Benito; Arenal, Ángel; García-Fernández,Javier; Ferrer, Ana; Sebastian, Rafael; Martinez-Camblor, Pablo; Jalife, José; Berenfeld, Omer (Ovid Technologies Wolters Kluwer -American Heart Association, 2015-10)

[EN] Background¿ Ventricular fibrillation (VF) has been proposed to be maintained by localized high-frequency sources. We tested whether spectral-phase analysis of the precordial ECG enabled identification of periodic ...