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Listar por palabra clave "Computer model"

Mostrando ítems 1-16 de 16

A clinically-oriented computer model for radiofrequency ablation of hepatic tissue with internally cooled wet electrode

Ewertowska, Elzbieta; Quesada-Diez, Rita; Radosevic, A.; Andaluz, Anna; Moll, Xavier; García Arnás, F.; Berjano, Enrique; Burdío Pinilla, Fernando; Trujillo Guillen, Macarena (Taylor & Francis, 2019)

[EN] Purpose: To improve the computer modelling of radiofrequency ablation (RFA) by internally cooled wet (ICW) electrodes with added clinically oriented features. Methods: An improved RFA computer model by ICW electrode ...
Computer modeling for radiofrequency bipolar ablation inside ducts and vessels: Relation between pullback speed and impedance progress

Pérez, Juan J; Ewertowska, Elzbieta; Berjano, Enrique (John Wiley & Sons, 2020-11)

[EN] Background and Objectives Radiofrequency (RF)-induced ablation can be carried out inside ducts and vessels by simultaneously dragging a bipolar catheter while applying RF power. Our objective was to characterize the ...
Computer modeling of radiofrequency cardiac ablation including heartbeat-induced electrode displacement

Pérez, Juan J; Nadal, Enrique; Berjano, Enrique; González Suárez, Ana (Elsevier, 2022-05)

[EN] Background: The state of the art in computer modeling of radiofrequency catheter ablation (RFCA) only considers a static situation, i.e. it ignores ablation electrode displacements induced by tissue movement due to ...
Differences in applied electrical power between full thorax models and limited domain models for RF cardiac ablation

Irastorza, Ramiro M.; Gonzalez-Suarez, Ana; Pérez, Juan J; Berjano, Enrique (Taylor & Francis, 2020-01-01)

[EN] Purpose:Most modeling studies on radiofrequency cardiac ablation (RFCA) are based on limited-domain models, which means the computational domain is restricted to a few centimeters of myocardium and blood around the ...
Effect of intracardiac blood flow pulsatility during radiofrequency cardiac ablation: computer modeling study

Parés, Cristina; Berjano, Enrique; González-Suárez, Ana (Taylor & Francis, 2021-01-01)

[EN] Purpose To assess the effect of intracardiac blood flow pulsatility on tissue and blood distributions during radiofrequency (RF) cardiac ablation (RFCA). Methods A three-dimensional computer model was used to ...
Effect of the trabecular bone microstructure on measuring its thermal conductivity: A computer modeling-based study

Fajardo, Jesús E.; Carlevaro, C. Manuel; Vericat, Fernando; Berjano, Enrique; Irastorza, Ramiro Miguel (Elsevier, 2018-12)

[EN] The objective of this work is to quantify the relation between the value of the effective thermal conductivity of trabecular bone and its microstructure and marrow content. The thermal conductivity of twenty bovine ...
Estudio mediante simulación del comportamiento electromecánico ventricular en insuficiencia cardíaca

Gil Mengual, Carla Caterina (Universitat Politècnica de València, 2021-09-09)

[ES] Según la OMS, la insuficiencia cardíaca es la tercera causa de muerte en patologías cardiovasculares en países desarrollados. Este trabajo se centra en estudiar mediante simulación computacional los cambios electromecánicos ...
High-power short-duration vs. standard radiofrequency cardiac ablation: comparative study based on an in-silico model

Coderch-Navarro, Sergi; Berjano, Enrique; Cámara, Óscar; González-Suárez, Ana (Taylor & Francis, 2021-01-01)

[EN] Purpose While the standard setting during radiofrequency catheter ablation (RFCA) consists of applying low power for long times, a new setting based on high power and short duration (HPSD) has recently been suggested ...
Numerical analysis of thermal impact of intramyocardial capillary blood flow during radiofrequency cardiac ablation

Pérez, Juan J; González Suárez, Ana; Berjano, Enrique (Taylor & Francis, 2018)

[EN] Purpose: The thermal effect of the intramyocardial blood perfusion on the size of lesions created by radiofrequency cardiac ablation (RFCA) has not been adequately studied to date. Our objective was to assess the ...
Radio-frequency heating of the cornea: theoretical model and in vitro experiments

Berjano, Enrique; Saiz Rodríguez, Francisco Javier; Ferrero Corral, José María (Institute of Electrical and Electronics Engineers, 2002)

[EN] We present a theoretical model for the study of cornea heating with radio-frequency currents. This technique is used to reshape the cornea to correct refractive disorders. Our numerical model has allowed the study of ...
Relation between Denaturation Time Measured by Optical Coherence Reflectometry and Thermal Lesion Depth during Radiofrequency Cardiac Ablation: Feasibility Numerical Study

González-Suárez, Ana; Herranz, David; Berjano, Enrique; Rubio-Guivernau, Jose L.; Margallo-Balbás, Eduardo (John Wiley & Sons, 2018)

[EN] Background/Objective Radiofrequency (RF) catheter ablation is a minimally invasive medical procedure used to thermally destroy the focus of cardiac arrhythmias. Novel optical techniques are now being integrated into ...
RF-Energized Intracoronary Guidewire to Enhance Bipolar Ablation of the Interventricular Septum: In-silico Feasibility Study

Pérez, Juan J; González Suárez, Ana; D Avila, Andre; Berjano, Enrique (Taylor & Francis, 2018)

[EN] Purpose: Although bipolar radiofrequency (RF) ablation (RFA) is broadly used to eliminate ventricular tachycardias in the interventricular septum wall, it can fail to create transmural lesions in thick ventricular ...
Ring electrode for radio-frequency heating of the cornea: modelling and in vitro experiments

Berjano, Enrique; Saiz Rodríguez, Francisco Javier; Alió, J.; Ferrero, J. M. (Springer-Verlag, 2003-11)

[EN] Radio-frequency thermokeratoplasty (RF-TKP) is a technique used to reshape the cornea curvature by means of thermal lesions using radio-frequency currents. This curvature change allows refractive disorders such as ...
Should fluid dynamics be included in computer models of RF cardiac ablation by irrigated-tip electrodes?

González Suárez, Ana; Pérez, Juan J; Berjano, Enrique (Springer (Biomed Central Ltd.), 2018)

[EN] Background: Although accurate modeling of the thermal performance of irrigated-tip electrodes in radiofrequency cardiac ablation requires the solution of a triple coupled problem involving simultaneous electrical ...
Thermal impact of balloon occlusion of the coronary sinus during mitral isthmus radiofrequency ablation: an in-silico study

González-Suárez, Ana; d'Avila, Andre; Pérez, Juan J; Reddy, Vivek Y.; Cámara, Óscar; Berjano, Enrique (Taylor & Francis, 2019-01-01)
Thermal Latency adds to Lesion Depth after Application of High-Power Short-Duration Radiofrequency Energy: Results of a computer-modeling study

Irastorza, Ramiro Miguel; D Avila, Andre; Berjano, Enrique (Blackwell Publishing, 2018)

[EN] Introduction: The use of ultra-short RF pulses could achieve greater lesion depth immediately after the application of the pulse due to thermal latency. Methods and results: A computer model of irrigated-catheter RF ...