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Listar por palabra clave "Cardiac ablation"

Mostrando ítems 1-16 de 16

Black-box modeling to estimate tissue temperature during radiofrequency catheter cardiac ablation: feasibility study on an agar phantom model

Blasco-Giménez, Ramón; Lequerica, Juan L.; Herrero, María; Hornero, Fernando; Berjano, Enrique (IOP Publishing, 2010-04)

[EN] The aim of this work was to study linear deterministic models to predict tissue temperature during radiofrequency cardiac ablation (RFCA) by measuring magnitudes such as electrode temperature, power and impedance ...
Comparative Analysis of Different Methods of Modeling the Thermal Effect of Circulating Blood Flow During RF Cardiac Ablation

González Suárez, Ana; Berjano, Enrique (Institute of Electrical and Electronics Engineers (IEEE), 2016-02)

Our aim was to compare the different methods of modeling the effect of circulating blood flow on the thermal lesion dimensions created by radio frequency (RF) cardiac ablation and on the maximum blood temperature. ...
Computational Models and Experimentation for Radiofrequency-based Ablative Techniques

González Suárez, Ana (Universitat Politècnica de València, 2014-03-14)

Las técnicas ablativas basadas en energía por radiofrecuencia (RF) se emplean con el fin de lograr un calentamiento seguro y localizado en el tejido biológico. En los últimos años ha habido un rápido crecimiento en el ...
Computer modeling of radiofrequency cardiac ablation: 30 years of bioengineering research

González-Suárez, Ana; Pérez, Juan J; Irastorza, Ramiro M.; D Avila, Andre; Berjano, Enrique (Elsevier, 2022-02)

[EN] This review begins with a rationale of the importance of theoretical, mathematical and computational models for radiofrequency (RF) catheter ablation (RFCA). We then describe the historical context in which each model ...
Could it be advantageous to tune the temperature controller during radiofrequency ablation? A feasibility study using theoretical models

Alba Martínez, José; Trujillo Guillen, Macarena; Blasco Giménez, Ramón Manuel; Berjano Zanón, Enrique (Informa Healthcare, 2011-09)

Purpose: To assess whether tailoring the Kp and Ki values of a proportional-integral (PI) controller during radiofrequency (RF) cardiac ablation could be advantageous from the point of view of the dynamic behaviour of the ...
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 ...
Disturbing Effect of Intra-Tissue Temperature Sensors in Pre-Clinical Experimental Studies of Radiofrequency Cardiac Ablation: A Computer-Based Modeling Study

Cuenca-Dacal, Luis; Berjano, Enrique; González-Suárez, Ana; Pérez, Juan J (MDPI AG, 2023-04-11)

[EN] Background: Preclinical studies on radiofrequency (RF) cardiac ablation (RFCA) use very small temperature sensors in specific positions in the tissue subjected to RF heating. Despite the sensors' small size, 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 ...
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 ...
How far the zone of heat-induced transient block extends beyond the lesion during RF catheter cardiac ablation

Pérez, Juan J; Berjano, Enrique; González Suárez, Ana (Taylor & Francis, 2023-01-02)

[EN] Purpose While radiofrequency catheter ablation (RFCA) creates a lesion consisting of the tissue points subjected to lethal heating, the sublethal heating (SH) undergone by the surrounding tissue can cause transient ...
In-silico modeling to compare radiofrequency-induced thermal lesions created on myocardium and thigh muscle

Pérez, Juan J; Berjano, Enrique; González-Suárez, Ana (MDPI AG, 2022-07-16)

[EN] Beating heart (BH) and thigh muscle (TM) are two pre-clinical models aimed at studying the lesion sizes created by radiofrequency (RF) catheters in cardiac ablation. Previous experimental results have shown that thermal ...
Lumped Element Electrical Model based on Three Resistors for Electrical Impedance in Radiofrequency Cardiac Ablation: Estimations from Analytical Calculations and Clinical Data

Berjano, Enrique; D Avila, Andre (Bentham Science, 2013)

[EN] The electrical impedance measured during radiofrequency cardiac ablation (RFCA) is widely used in clinical studies to predict the heating evolution and hence the success of the procedure. We hypothesized that a model ...
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 ...
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 ...
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 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 ...