Change in the local impedance and electrograms recorded by a micro‐electrode tip catheter during initial atrial fibrillation ablation
Abstract Background A novel measurement of the local impedance (LI) and electrograms recorded from micro‐electrodes on catheter tip has been developed. However, the data during pulmonary vein (PV) ablation is not sufficient. We aimed to investigate the utility of this measurement during initial atri...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-06-01
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| Series: | Journal of Arrhythmia |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/joa3.12535 |
| _version_ | 1818612598653845504 |
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| author | Kenji Hashimoto Ippei Tsuzuki Yuta Seki Susumu Ibe Terumasa Yamashita Hiroshi Miyama Taishi Fujisawa Yoshinori Katsumata Takehiro Kimura Keiichi Fukuda Seiji Takatsuki |
| author_facet | Kenji Hashimoto Ippei Tsuzuki Yuta Seki Susumu Ibe Terumasa Yamashita Hiroshi Miyama Taishi Fujisawa Yoshinori Katsumata Takehiro Kimura Keiichi Fukuda Seiji Takatsuki |
| author_sort | Kenji Hashimoto |
| collection | DOAJ |
| description | Abstract Background A novel measurement of the local impedance (LI) and electrograms recorded from micro‐electrodes on catheter tip has been developed. However, the data during pulmonary vein (PV) ablation is not sufficient. We aimed to investigate the utility of this measurement during initial atrial fibrillation (AF) ablation. Methods We investigated 111 representative radiofrequency applications in 7 AF patients without a history of prior ablation (6 males, age 68 [65‐72] years, 2 persistent AF). The ablation strategy was PV isolation for paroxysmal AF and single ring box isolation for persistent AF, using MiFi catheter. The correlation of the generator impedance (GI) drop and LI drop after radiofrequency applications and the predictive value of the initial LI elevation before radiofrequency applications for LI drop were analyzed. Also, the LI and GI drop were investigated according to the location of RF applications. Results The LI drop was higher than GI drop (23.7 [16.4‐35.7] and 9.0 [6.0‐12.0]; P < .01). There were correlations between the initial LI elevation and LI drop (R2 = 0.466, P < .01) and between the LI and GI drop (R2 = 0.263, P < .01). The LI drops significantly differed according to the different anatomical localizations by the Kruskal–Wallis test, although the GI drops did not differ (P < .01 and P = .49, respectively) Conclusion LI drop was associated with initial LI elevation and was larger than GI drop. LI drop was different according to locations, although GI drop was not. These findings might indicate that LI drop would be a more sensitive marker for lesion formation than GI drop. |
| first_indexed | 2024-12-16T15:48:46Z |
| format | Article |
| id | doaj.art-7c269211ce8a4fc3a0b606f145a8eb2b |
| institution | Directory Open Access Journal |
| issn | 1880-4276 1883-2148 |
| language | English |
| last_indexed | 2024-12-16T15:48:46Z |
| publishDate | 2021-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Arrhythmia |
| spelling | doaj.art-7c269211ce8a4fc3a0b606f145a8eb2b2022-12-21T22:25:44ZengWileyJournal of Arrhythmia1880-42761883-21482021-06-0137356657310.1002/joa3.12535Change in the local impedance and electrograms recorded by a micro‐electrode tip catheter during initial atrial fibrillation ablationKenji Hashimoto0Ippei Tsuzuki1Yuta Seki2Susumu Ibe3Terumasa Yamashita4Hiroshi Miyama5Taishi Fujisawa6Yoshinori Katsumata7Takehiro Kimura8Keiichi Fukuda9Seiji Takatsuki10Department of Cardiology Keio University School of Medicine Tokyo JapanDepartment of Cardiology Keio University School of Medicine Tokyo JapanDepartment of Cardiology Keio University School of Medicine Tokyo JapanDepartment of Cardiology Keio University School of Medicine Tokyo JapanDepartment of Cardiology Keio University School of Medicine Tokyo JapanDepartment of Cardiology Keio University School of Medicine Tokyo JapanDepartment of Cardiology Keio University School of Medicine Tokyo JapanDepartment of Cardiology Keio University School of Medicine Tokyo JapanDepartment of Cardiology Keio University School of Medicine Tokyo JapanDepartment of Cardiology Keio University School of Medicine Tokyo JapanDepartment of Cardiology Keio University School of Medicine Tokyo JapanAbstract Background A novel measurement of the local impedance (LI) and electrograms recorded from micro‐electrodes on catheter tip has been developed. However, the data during pulmonary vein (PV) ablation is not sufficient. We aimed to investigate the utility of this measurement during initial atrial fibrillation (AF) ablation. Methods We investigated 111 representative radiofrequency applications in 7 AF patients without a history of prior ablation (6 males, age 68 [65‐72] years, 2 persistent AF). The ablation strategy was PV isolation for paroxysmal AF and single ring box isolation for persistent AF, using MiFi catheter. The correlation of the generator impedance (GI) drop and LI drop after radiofrequency applications and the predictive value of the initial LI elevation before radiofrequency applications for LI drop were analyzed. Also, the LI and GI drop were investigated according to the location of RF applications. Results The LI drop was higher than GI drop (23.7 [16.4‐35.7] and 9.0 [6.0‐12.0]; P < .01). There were correlations between the initial LI elevation and LI drop (R2 = 0.466, P < .01) and between the LI and GI drop (R2 = 0.263, P < .01). The LI drops significantly differed according to the different anatomical localizations by the Kruskal–Wallis test, although the GI drops did not differ (P < .01 and P = .49, respectively) Conclusion LI drop was associated with initial LI elevation and was larger than GI drop. LI drop was different according to locations, although GI drop was not. These findings might indicate that LI drop would be a more sensitive marker for lesion formation than GI drop.https://doi.org/10.1002/joa3.12535atrial fibrillationcatheter ablationimpedance |
| spellingShingle | Kenji Hashimoto Ippei Tsuzuki Yuta Seki Susumu Ibe Terumasa Yamashita Hiroshi Miyama Taishi Fujisawa Yoshinori Katsumata Takehiro Kimura Keiichi Fukuda Seiji Takatsuki Change in the local impedance and electrograms recorded by a micro‐electrode tip catheter during initial atrial fibrillation ablation Journal of Arrhythmia atrial fibrillation catheter ablation impedance |
| title | Change in the local impedance and electrograms recorded by a micro‐electrode tip catheter during initial atrial fibrillation ablation |
| title_full | Change in the local impedance and electrograms recorded by a micro‐electrode tip catheter during initial atrial fibrillation ablation |
| title_fullStr | Change in the local impedance and electrograms recorded by a micro‐electrode tip catheter during initial atrial fibrillation ablation |
| title_full_unstemmed | Change in the local impedance and electrograms recorded by a micro‐electrode tip catheter during initial atrial fibrillation ablation |
| title_short | Change in the local impedance and electrograms recorded by a micro‐electrode tip catheter during initial atrial fibrillation ablation |
| title_sort | change in the local impedance and electrograms recorded by a micro electrode tip catheter during initial atrial fibrillation ablation |
| topic | atrial fibrillation catheter ablation impedance |
| url | https://doi.org/10.1002/joa3.12535 |
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