Local multifrequency impedance changes after radiofrequency ablation in human atria: potential use for tissue characterization
Background: Local impedance (LI) mapping provides additional tissue characterization of the atria substrate. Measuring LI at different current frequencies has the advantage of exploring intra- and extra-cellular compartments and may add useful information about tissue integrity. The objective of thi...
| Autores: | , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/450165 |
| Acceso en línea: | https://hdl.handle.net/2117/450165 https://dx.doi.org/10.3389/fcvm.2025.1668533 |
| Access Level: | acceso abierto |
| Palabra clave: | Local multifrequency impedance Radiofrequency ablation Electrophysiology Tissue characterization Lesion assessment Àrees temàtiques de la UPC::Enginyeria electrònica |
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Local multifrequency impedance changes after radiofrequency ablation in human atria: potential use for tissue characterizationAmorós Figueras, GerardMoreno Weidmann, ZoraidaMéndez Zurita, FranciscoSoriano Amores, MarcBragós Bardia, Ramon|||0000-0002-1373-1588Rosell Ferrer, Francisco Javier|||0000-0002-9691-328XGuerra Ramos, José MªLocal multifrequency impedanceRadiofrequency ablationElectrophysiologyTissue characterizationLesion assessmentÀrees temàtiques de la UPC::Enginyeria electrònicaBackground: Local impedance (LI) mapping provides additional tissue characterization of the atria substrate. Measuring LI at different current frequencies has the advantage of exploring intra- and extra-cellular compartments and may add useful information about tissue integrity. The objective of this study was to characterize the changes in local multifrequency impedance (LMI) after radiofrequency ablation in human atrial tissue. Methods: In fifteen patients undergoing catheter ablation of atrial arrhythmias, we constructed a baseline high-density electroanatomical map (EAM) and measured the LMI (1–1,000 kHz) at fifty sites around the cava veins using the QDOT or Smarttouch electrocatheter. Then a point-by-point pulmonary vein isolation procedure was performed using radiofrequency energy in a temperature controlled mode (90W for 4 s for QDOT/30W for 30 s for Smarttouch). After confirming the PVI fifty additional LMI recordings per patient were performed around the initial sites. We performed an offline analysis to compare the values of bipolar voltage and LMI of blood, pre- and post-ablated tissue. We also analyzed the cardiac cycle changes of LMI and the effects of catheter orientation to the LMI, contact force and bipolar voltage. Results: A total of 641 pre-ablated and 190 post-ablated sites were studied from all patients. Blood pool, healthy and post-ablated myocardium presented distinctive LMI signatures (ZPRE¿=¿110¿±¿15 O vs. ZPOST¿=¿90¿±¿10 O vs. ZBLOOD¿=¿90¿±¿8 O; p¿<¿0.001). LMI cyclic changes showed an inverse relationship with the contact force, and these were more attenuated in the post-ablated tissue (p¿<¿0.001). Conclusions: LMI can differentiate pre- from post-ablated tissue in a cohort of patients submitted to RF ablations. This new tool could be of potential clinical applicability for the characterization of the atrial substrate and to monitor lesion quality to perform durable ablation lesions.Peer ReviewedFrontiers Media SA20252025-10-0720262026-01-13journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/450165https://dx.doi.org/10.3389/fcvm.2025.1668533reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/4501652026-05-27T15:37:01Z |
| dc.title.none.fl_str_mv |
Local multifrequency impedance changes after radiofrequency ablation in human atria: potential use for tissue characterization |
| title |
Local multifrequency impedance changes after radiofrequency ablation in human atria: potential use for tissue characterization |
| spellingShingle |
Local multifrequency impedance changes after radiofrequency ablation in human atria: potential use for tissue characterization Amorós Figueras, Gerard Local multifrequency impedance Radiofrequency ablation Electrophysiology Tissue characterization Lesion assessment Àrees temàtiques de la UPC::Enginyeria electrònica |
| title_short |
Local multifrequency impedance changes after radiofrequency ablation in human atria: potential use for tissue characterization |
| title_full |
Local multifrequency impedance changes after radiofrequency ablation in human atria: potential use for tissue characterization |
| title_fullStr |
Local multifrequency impedance changes after radiofrequency ablation in human atria: potential use for tissue characterization |
| title_full_unstemmed |
Local multifrequency impedance changes after radiofrequency ablation in human atria: potential use for tissue characterization |
| title_sort |
Local multifrequency impedance changes after radiofrequency ablation in human atria: potential use for tissue characterization |
| dc.creator.none.fl_str_mv |
Amorós Figueras, Gerard Moreno Weidmann, Zoraida Méndez Zurita, Francisco Soriano Amores, Marc Bragós Bardia, Ramon|||0000-0002-1373-1588 Rosell Ferrer, Francisco Javier|||0000-0002-9691-328X Guerra Ramos, José Mª |
| author |
Amorós Figueras, Gerard |
| author_facet |
Amorós Figueras, Gerard Moreno Weidmann, Zoraida Méndez Zurita, Francisco Soriano Amores, Marc Bragós Bardia, Ramon|||0000-0002-1373-1588 Rosell Ferrer, Francisco Javier|||0000-0002-9691-328X Guerra Ramos, José Mª |
| author_role |
author |
| author2 |
Moreno Weidmann, Zoraida Méndez Zurita, Francisco Soriano Amores, Marc Bragós Bardia, Ramon|||0000-0002-1373-1588 Rosell Ferrer, Francisco Javier|||0000-0002-9691-328X Guerra Ramos, José Mª |
| author2_role |
author author author author author author |
| dc.subject.none.fl_str_mv |
Local multifrequency impedance Radiofrequency ablation Electrophysiology Tissue characterization Lesion assessment Àrees temàtiques de la UPC::Enginyeria electrònica |
| topic |
Local multifrequency impedance Radiofrequency ablation Electrophysiology Tissue characterization Lesion assessment Àrees temàtiques de la UPC::Enginyeria electrònica |
| description |
Background: Local impedance (LI) mapping provides additional tissue characterization of the atria substrate. Measuring LI at different current frequencies has the advantage of exploring intra- and extra-cellular compartments and may add useful information about tissue integrity. The objective of this study was to characterize the changes in local multifrequency impedance (LMI) after radiofrequency ablation in human atrial tissue. Methods: In fifteen patients undergoing catheter ablation of atrial arrhythmias, we constructed a baseline high-density electroanatomical map (EAM) and measured the LMI (1–1,000 kHz) at fifty sites around the cava veins using the QDOT or Smarttouch electrocatheter. Then a point-by-point pulmonary vein isolation procedure was performed using radiofrequency energy in a temperature controlled mode (90W for 4 s for QDOT/30W for 30 s for Smarttouch). After confirming the PVI fifty additional LMI recordings per patient were performed around the initial sites. We performed an offline analysis to compare the values of bipolar voltage and LMI of blood, pre- and post-ablated tissue. We also analyzed the cardiac cycle changes of LMI and the effects of catheter orientation to the LMI, contact force and bipolar voltage. Results: A total of 641 pre-ablated and 190 post-ablated sites were studied from all patients. Blood pool, healthy and post-ablated myocardium presented distinctive LMI signatures (ZPRE¿=¿110¿±¿15 O vs. ZPOST¿=¿90¿±¿10 O vs. ZBLOOD¿=¿90¿±¿8 O; p¿<¿0.001). LMI cyclic changes showed an inverse relationship with the contact force, and these were more attenuated in the post-ablated tissue (p¿<¿0.001). Conclusions: LMI can differentiate pre- from post-ablated tissue in a cohort of patients submitted to RF ablations. This new tool could be of potential clinical applicability for the characterization of the atrial substrate and to monitor lesion quality to perform durable ablation lesions. |
| publishDate |
2025 |
| dc.date.none.fl_str_mv |
2025 2025-10-07 2026 2026-01-13 |
| dc.type.none.fl_str_mv |
journal article http://purl.org/coar/resource_type/c_6501 VoR http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2117/450165 https://dx.doi.org/10.3389/fcvm.2025.1668533 |
| url |
https://hdl.handle.net/2117/450165 https://dx.doi.org/10.3389/fcvm.2025.1668533 |
| dc.language.none.fl_str_mv |
Inglés eng |
| language_invalid_str_mv |
Inglés |
| language |
eng |
| dc.rights.none.fl_str_mv |
open access http://purl.org/coar/access_right/c_abf2 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
| dc.rights.openaire.fl_str_mv |
info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
open access http://purl.org/coar/access_right/c_abf2 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
| eu_rights_str_mv |
openAccess |
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application/pdf |
| dc.publisher.none.fl_str_mv |
Frontiers Media SA |
| publisher.none.fl_str_mv |
Frontiers Media SA |
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reponame:UPCommons. Portal del coneixement obert de la UPC instname:Universitat Politècnica de Catalunya (UPC) |
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Universitat Politècnica de Catalunya (UPC) |
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UPCommons. Portal del coneixement obert de la UPC |
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UPCommons. Portal del coneixement obert de la UPC |
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