Evaluation of the contributors of generator impedance during radiofrequency catheter ablation

Sekihara, Takayuki; Tanaka, Yuma; Ota, Yuto; Tanabiki, Koki; Yamanaka, Tomohiro; Taniguchi, Masaki; Kawakita, Hiroki; Nakano, Tomoaki; Yoshida, Akira; Oka, Takafumi; Sakata, Yasushi

doi:https://doi.org/10.1007/s00380-025-02601-y

Evaluation of the contributors of generator impedance during radiofrequency catheter ablation

Sekihara, Takayuki; Tanaka, Yuma; Ota, Yuto et al.

Heart and Vessels, 2025

アクセス数:41件（2025-12-11 03:44 集計）

固定URL: https://hdl.handle.net/11094/103270

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タイトル	Evaluation of the contributors of generator impedance during radiofrequency catheter ablation
著者	ORCID 0000-0001-9191-7153 0000-0001-9191-7153 researchmap permalink javelin javelin Scopus Author ID 56754941100 56754941100 著者名 Sekihara, Takayuki
	著者名 Tanaka, Yuma
	著者名 Ota, Yuto
	著者名 Tanabiki, Koki
	著者名 Yamanaka, Tomohiro
	著者名 Taniguchi, Masaki
	著者名 Kawakita, Hiroki
	NRID 1000090723180 1000090723180 ORCID 0009-0008-4991-0087 0009-0008-4991-0087 researchmap permalink tomoaki85927 tomoaki85927 Scopus Author ID 57218381901 57218381901 著者名 Nakano, Tomoaki
	著者名 Yoshida, Akira
	NRID 1000030647285 1000030647285 researchmap permalink Takafumioka0410 Takafumioka0410 Scopus Author ID 8712739400 8712739400 著者名 Oka, Takafumi
	NRID 1000000397671 1000000397671 ORCID 0000-0002-5618-4721 0000-0002-5618-4721 researchmap permalink C4589 C4589 Scopus Author ID 35395964700 35395964700 著者名 Sakata, Yasushi
キーワード等	Bioelectrical Impedance
	Body Mass Index
	Electrodes
	Hematocrit
	Radiofrequency catheter ablation
内容	The version of record of this article, first published in Heart and Vessels (2025), is available online at Publisher’s website: https://doi.org/10.1007/s00380-025-02601-y
抄録	This study aimed to clarify the contributions of dispersive electrode configuration, extracardiac impedance, and blood pool impedance to generator impedance (GI). Forty-five patients who underwent catheter ablation with Intellanav Stablepoint™ catheter were included. Four dispersive electrode positions were tested: the left hip, lower back, middle back, and upper back. For each dispersive electrode position, GI in the blood pool (BP-GI) and GI during contact with the myocardium of the left atrial anterior wall (Myo-GI) were measured at 46 kHz in standby mode. Body mass index (BMI) and hematocrit served as surrogates for extracardiac and blood pool impedance, respectively. The lowest BP-GI and Myo-GI were observed with the middle back dispersive electrode (BP-GI: 119 ± 13 Ω; Myo-GI: 123 ± 13 Ω), followed by the upper back (122 ± 13 Ω; 126 ± 13 Ω), lower back (126 ± 14 Ω; 129 ± 14 Ω), and the left hip dispersive electrode (153 ± 15 Ω; 156 ± 14 Ω). With the middle back dispersive electrode, BMI and hematocrit predicted BP-GI and Myo-GI with acceptable accuracy (adjusted R² = 0.78 and 0.55, respectively). The standardized beta coefficients of BMI and hematocrit were 0.38 and 0.70 for BP-GI and 0.37 and 0.54 for Myo-GI, respectively. The middle back dispersive electrode yielded the lowest GI. GI differences among the back positions were small. BMI and hematocrit accurately predicted GI under the optimal (middle back) dispersive electrode position, and the effect of hematocrit was greater than that of BMI.
出版者	Springer
収録物名	Heart and Vessels
刊行年月	2025-10-10
言語	英語
ハンドルURL	https://hdl.handle.net/11094/103270
PISSN	09108327
eISSN	16152573
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1007/s00380-025-02601-y
アクセス権	open access
権利情報	This article is licensed under a Creative Commons Attribution 4.0 International License.
出版タイプ	Version of Record
カテゴリ	学術雑誌論文 Journal Article

資源タイプ	学術雑誌論文
ローカル資源タイプ	学術雑誌論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Heart and Vessels. 2025
DC.title	Evaluation of the contributors of generator impedance during radiofrequency catheter ablation
DC.creator	Sekihara, Takayuki
	Tanaka, Yuma
	Ota, Yuto
	Tanabiki, Koki
	Yamanaka, Tomohiro
	Taniguchi, Masaki
	Kawakita, Hiroki
	Nakano, Tomoaki
	Yoshida, Akira
	Oka, Takafumi
	Sakata, Yasushi
DC.publisher	Springer
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2025-10-10
DC.identifier	https://doi.org/10.1007/s00380-025-02601-y
DC.subject	Bioelectrical Impedance
	Body Mass Index
	Electrodes
	Hematocrit
	Radiofrequency catheter ablation
DC.description	The version of record of this article, first published in Heart and Vessels (2025), is available online at Publisher’s website: https://doi.org/10.1007/s00380-025-02601-y
DCTERMS.abstract	This study aimed to clarify the contributions of dispersive electrode configuration, extracardiac impedance, and blood pool impedance to generator impedance (GI). Forty-five patients who underwent catheter ablation with Intellanav Stablepoint™ catheter were included. Four dispersive electrode positions were tested: the left hip, lower back, middle back, and upper back. For each dispersive electrode position, GI in the blood pool (BP-GI) and GI during contact with the myocardium of the left atrial anterior wall (Myo-GI) were measured at 46 kHz in standby mode. Body mass index (BMI) and hematocrit served as surrogates for extracardiac and blood pool impedance, respectively. The lowest BP-GI and Myo-GI were observed with the middle back dispersive electrode (BP-GI: 119 ± 13 Ω; Myo-GI: 123 ± 13 Ω), followed by the upper back (122 ± 13 Ω; 126 ± 13 Ω), lower back (126 ± 14 Ω; 129 ± 14 Ω), and the left hip dispersive electrode (153 ± 15 Ω; 156 ± 14 Ω). With the middle back dispersive electrode, BMI and hematocrit predicted BP-GI and Myo-GI with acceptable accuracy (adjusted R² = 0.78 and 0.55, respectively). The standardized beta coefficients of BMI and hematocrit were 0.38 and 0.70 for BP-GI and 0.37 and 0.54 for Myo-GI, respectively. The middle back dispersive electrode yielded the lowest GI. GI differences among the back positions were small. BMI and hematocrit accurately predicted GI under the optimal (middle back) dispersive electrode position, and the effect of hematocrit was greater than that of BMI.
DC.rights	This article is licensed under a Creative Commons Attribution 4.0 International License.
DC.format	103270
citation_title	Evaluation of the contributors of generator impedance during radiofrequency catheter ablation
citation_author	Sekihara, Takayuki
	Tanaka, Yuma
	Ota, Yuto
	Tanabiki, Koki
	Yamanaka, Tomohiro
	Taniguchi, Masaki
	Kawakita, Hiroki
	Nakano, Tomoaki
	Yoshida, Akira
	Oka, Takafumi
	Sakata, Yasushi
citation_publisher	Springer
citation_language	英語
citation_date	2025-10-10
citation_journal_title	Heart and Vessels
citation_doi	https://doi.org/10.1007/s00380-025-02601-y
citation_public_url	https://hdl.handle.net/11094/103270

Evaluation of the contributors of generator impedance during radiofrequency catheter ablation

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