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The comparison of lesion outline and temperature field determined by different ways in atrial radiofrequency ablation

BACKGROUND: The aim of this study is to research the lesion outline and temperature field in different ways in atrial radiofrequency ablation by using finite element method. METHODS: This study used the method which considered the thermal dosage to determine the boundary between viable and dead tiss...

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Autores principales: Tian, Zhen, Nan, Qun, Nie, Xiaohui, Dong, Tong, Wang, Ruirui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5259815/
https://www.ncbi.nlm.nih.gov/pubmed/28155684
http://dx.doi.org/10.1186/s12938-016-0251-5
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author Tian, Zhen
Nan, Qun
Nie, Xiaohui
Dong, Tong
Wang, Ruirui
author_facet Tian, Zhen
Nan, Qun
Nie, Xiaohui
Dong, Tong
Wang, Ruirui
author_sort Tian, Zhen
collection PubMed
description BACKGROUND: The aim of this study is to research the lesion outline and temperature field in different ways in atrial radiofrequency ablation by using finite element method. METHODS: This study used the method which considered the thermal dosage to determine the boundary between viable and dead tissue, and compared to the 50 °C isotherm results in analyzing lesion outline. Besides, we used Hyperbolic equation which considered the relaxation time to calculate the temperature field and contrasted it with Pennes’ bioheat transfer equation. RESULTS: As the result of the comparison of the lesion outline, when the ablation time was 120 s, the isotherm of the thermal dosage was larger than the 50 °C isotherm and with the increasing of the voltage the gap increased. When the ablation voltage was 30 V, the 50 °C isotherm was larger than the thermal dosage isotherm when the ablation time was less than 160 s. The isotherms overlapped when the time was 160 s. And when the ablation time was more than 160 s, the 50 °C isotherm was less than the thermal dosage isotherm. As to the temperature field, when the ablation voltage was 30 V with the ablation time 120 s the highest temperature decided by Hyperbolic was 0.761 °C higher. The highest temperature changed with relaxation time. In most cases, the highest temperature of the Hyperbolic was higher otherwise the relaxation time was 30–40 s. CONCLUSIONS: It is better to use CEM43 °C to estimate the lesion outline when the ablative time within 160 s. For temperature distribution, the Hyperbolic reflects the influence of heat transmission speed, so the result is more close to the actual situation.
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spelling pubmed-52598152017-01-26 The comparison of lesion outline and temperature field determined by different ways in atrial radiofrequency ablation Tian, Zhen Nan, Qun Nie, Xiaohui Dong, Tong Wang, Ruirui Biomed Eng Online Research BACKGROUND: The aim of this study is to research the lesion outline and temperature field in different ways in atrial radiofrequency ablation by using finite element method. METHODS: This study used the method which considered the thermal dosage to determine the boundary between viable and dead tissue, and compared to the 50 °C isotherm results in analyzing lesion outline. Besides, we used Hyperbolic equation which considered the relaxation time to calculate the temperature field and contrasted it with Pennes’ bioheat transfer equation. RESULTS: As the result of the comparison of the lesion outline, when the ablation time was 120 s, the isotherm of the thermal dosage was larger than the 50 °C isotherm and with the increasing of the voltage the gap increased. When the ablation voltage was 30 V, the 50 °C isotherm was larger than the thermal dosage isotherm when the ablation time was less than 160 s. The isotherms overlapped when the time was 160 s. And when the ablation time was more than 160 s, the 50 °C isotherm was less than the thermal dosage isotherm. As to the temperature field, when the ablation voltage was 30 V with the ablation time 120 s the highest temperature decided by Hyperbolic was 0.761 °C higher. The highest temperature changed with relaxation time. In most cases, the highest temperature of the Hyperbolic was higher otherwise the relaxation time was 30–40 s. CONCLUSIONS: It is better to use CEM43 °C to estimate the lesion outline when the ablative time within 160 s. For temperature distribution, the Hyperbolic reflects the influence of heat transmission speed, so the result is more close to the actual situation. BioMed Central 2016-12-28 /pmc/articles/PMC5259815/ /pubmed/28155684 http://dx.doi.org/10.1186/s12938-016-0251-5 Text en © The Author(s) 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research
Tian, Zhen
Nan, Qun
Nie, Xiaohui
Dong, Tong
Wang, Ruirui
The comparison of lesion outline and temperature field determined by different ways in atrial radiofrequency ablation
title The comparison of lesion outline and temperature field determined by different ways in atrial radiofrequency ablation
title_full The comparison of lesion outline and temperature field determined by different ways in atrial radiofrequency ablation
title_fullStr The comparison of lesion outline and temperature field determined by different ways in atrial radiofrequency ablation
title_full_unstemmed The comparison of lesion outline and temperature field determined by different ways in atrial radiofrequency ablation
title_short The comparison of lesion outline and temperature field determined by different ways in atrial radiofrequency ablation
title_sort comparison of lesion outline and temperature field determined by different ways in atrial radiofrequency ablation
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5259815/
https://www.ncbi.nlm.nih.gov/pubmed/28155684
http://dx.doi.org/10.1186/s12938-016-0251-5
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