Clinical implications of local impedance measurement using the IntellaNav MiFi OI ablation catheter: an ex vivo study
Purpose Clinical implication of local impedance (LI) for radiofrequency (RF) ablation has not been fully established. This study aimed to investigate this point using IntellaNav MiFi OI TM catheter. Methods LI and generator impedance drops (ΔLI and ΔGI) were evaluated in excised porcine hearts ( N =...
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| Veröffentlicht in: | Journal of interventional cardiac electrophysiology 2022-01, Vol.63 (1), p.185-195 |
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| creator | Iwakawa, Hidehiro Takigawa, Masateru Goya, Masahiko Iwata, Toyoto Martin, Claire A. Anzai, Tatsuhiko Takahashi, Kunihiko Amemiya, Miki Yamamoto, Tasuku Sekigawa, Masahiro Shirai, Yasuhiro Tao, Susumu Hayashi, Tatsuya Takahashi, Yoshihide Watanabe, Hiroyuki Sasano, Tetsuo |
| description | Purpose
Clinical implication of local impedance (LI) for radiofrequency (RF) ablation has not been fully established. This study aimed to investigate this point using IntellaNav MiFi OI
TM
catheter.
Methods
LI and generator impedance drops (ΔLI and ΔGI) were evaluated in excised porcine hearts (
N
= 16) during RF applications at a range of powers (30 and 50 W), contact forces (5–40 g), and durations (10–180 s) using perpendicular or parallel catheter orientation. Additionally, temporal LI changes were assessed.
Results
Of the 240 lesions without steam pops (92.3%), ΔLI showed better correlations with lesion surface area (
ρ
= 0.55 vs 0.36,
P
= 0.004), maximum depth (
ρ
= 0.53 vs 0.14,
P
< 0.001), and lesion volume (
ρ
= 0.64 vs 0.23,
P
< 0.001) than ΔGI. Furthermore, %LI-drop (ΔLI/initial LI) demonstrated stronger correlations with lesion surface area (
ρ
= 0.60 vs 0.55,
P
< 0.001), maximum depth (
ρ
= 0.57 vs 0.53,
P
< 0.001), and volume (
ρ
= 0.69 vs 0.64,
P
< 0.001) than ΔLI. Parallel catheter orientation improved correlation of ΔLI with lesion surface area (
ρ
= 0.63 vs 0.40,
P
= 0.015) and depth (
ρ
= 0.68 vs 0.45,
P
= 0.008) and created a larger surface lesion (36.3[29.2–42.7] mm
2
vs 28.8[21.6–34.2] mm
2
,
P
< 0.001) than the perpendicular. LI of the lesions significantly differed between baseline, immediately after RF, and 5 min after (
P
< 0.01). LI reaching plateau, larger initial LI, ΔLI, and %LI-drop, and larger RF power and longer duration were observed in pop lesions (
P
< 0.05).
Conclusions
%LI-drop demonstrated a better correlation with lesion size than ΔLI. LI may be used as an additional parameter to predict lesion size and steam pops. Temporal variation and catheter orientation should be considered to interpret LI. |
| doi_str_mv | 10.1007/s10840-021-00954-8 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_journals_2619056339</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2619056339</sourcerecordid><originalsourceid>FETCH-LOGICAL-c441t-84ccec9f21c41291ea165b42d54c71fb032b67d04aad0eb5051e89615e2026b83</originalsourceid><addsrcrecordid>eNp9kMtOwzAQRS0E4v0DLJAl1gE_E4cdqnhUAroBiZ3lOBMwSpxiJxX9e0xbYMfKI8-ZM5qL0Akl55SQ4iJSogTJCKMZIaUUmdpC-1QWLFOylNup5opnqpAve-ggxneSKMLyXbTHeU5zVZT7aJy0zjtrWuy6eZuKwfU-4r7Bbb_5hdp4C7gDE8cAHfgBj9H5Vzy8AZ76AdrWPJoFfnA3Ds-m2FTtyoKT7A0GCJfYeAyfeOEWPY7DWC-P0E5j2gjHm_cQPd9cP03usvvZ7XRydZ9ZIeiQKWEt2LJh1ArKSgqG5rISrJbCFrSpCGdVXtREGFMTqCSRFFSZUwks3VkpfojO1t556D9GiIN-78fg00rNcloSmXNeJoqtKRv6GAM0eh5cZ8JSU6K_k9brpHVKWq-S1t_q0416rDqof0d-ok0AXwMxtfwrhL_d_2i_AHc6ia4</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2619056339</pqid></control><display><type>article</type><title>Clinical implications of local impedance measurement using the IntellaNav MiFi OI ablation catheter: an ex vivo study</title><source>MEDLINE</source><source>Springer Nature - Complete Springer Journals</source><creator>Iwakawa, Hidehiro ; Takigawa, Masateru ; Goya, Masahiko ; Iwata, Toyoto ; Martin, Claire A. ; Anzai, Tatsuhiko ; Takahashi, Kunihiko ; Amemiya, Miki ; Yamamoto, Tasuku ; Sekigawa, Masahiro ; Shirai, Yasuhiro ; Tao, Susumu ; Hayashi, Tatsuya ; Takahashi, Yoshihide ; Watanabe, Hiroyuki ; Sasano, Tetsuo</creator><creatorcontrib>Iwakawa, Hidehiro ; Takigawa, Masateru ; Goya, Masahiko ; Iwata, Toyoto ; Martin, Claire A. ; Anzai, Tatsuhiko ; Takahashi, Kunihiko ; Amemiya, Miki ; Yamamoto, Tasuku ; Sekigawa, Masahiro ; Shirai, Yasuhiro ; Tao, Susumu ; Hayashi, Tatsuya ; Takahashi, Yoshihide ; Watanabe, Hiroyuki ; Sasano, Tetsuo</creatorcontrib><description><![CDATA[Purpose
Clinical implication of local impedance (LI) for radiofrequency (RF) ablation has not been fully established. This study aimed to investigate this point using IntellaNav MiFi OI
TM
catheter.
Methods
LI and generator impedance drops (ΔLI and ΔGI) were evaluated in excised porcine hearts (
N
= 16) during RF applications at a range of powers (30 and 50 W), contact forces (5–40 g), and durations (10–180 s) using perpendicular or parallel catheter orientation. Additionally, temporal LI changes were assessed.
Results
Of the 240 lesions without steam pops (92.3%), ΔLI showed better correlations with lesion surface area (
ρ
= 0.55 vs 0.36,
P
= 0.004), maximum depth (
ρ
= 0.53 vs 0.14,
P
< 0.001), and lesion volume (
ρ
= 0.64 vs 0.23,
P
< 0.001) than ΔGI. Furthermore, %LI-drop (ΔLI/initial LI) demonstrated stronger correlations with lesion surface area (
ρ
= 0.60 vs 0.55,
P
< 0.001), maximum depth (
ρ
= 0.57 vs 0.53,
P
< 0.001), and volume (
ρ
= 0.69 vs 0.64,
P
< 0.001) than ΔLI. Parallel catheter orientation improved correlation of ΔLI with lesion surface area (
ρ
= 0.63 vs 0.40,
P
= 0.015) and depth (
ρ
= 0.68 vs 0.45,
P
= 0.008) and created a larger surface lesion (36.3[29.2–42.7] mm
2
vs 28.8[21.6–34.2] mm
2
,
P
< 0.001) than the perpendicular. LI of the lesions significantly differed between baseline, immediately after RF, and 5 min after (
P
< 0.01). LI reaching plateau, larger initial LI, ΔLI, and %LI-drop, and larger RF power and longer duration were observed in pop lesions (
P
< 0.05).
Conclusions
%LI-drop demonstrated a better correlation with lesion size than ΔLI. LI may be used as an additional parameter to predict lesion size and steam pops. Temporal variation and catheter orientation should be considered to interpret LI.]]></description><identifier>ISSN: 1383-875X</identifier><identifier>EISSN: 1572-8595</identifier><identifier>DOI: 10.1007/s10840-021-00954-8</identifier><identifier>PMID: 33616879</identifier><language>eng</language><publisher>New York: Springer US</publisher><subject>Ablation ; Animals ; Cardiology ; Catheter Ablation ; Catheters ; Contact force ; Correlation ; Electric Impedance ; Impedance ; Impedance measurement ; Lesions ; Medical instruments ; Medicine ; Medicine & Public Health ; Orientation ; Radio frequency ; Steam ; Surface area ; Swine ; Temporal variations ; Therapeutic Irrigation</subject><ispartof>Journal of interventional cardiac electrophysiology, 2022-01, Vol.63 (1), p.185-195</ispartof><rights>Springer Science+Business Media, LLC, part of Springer Nature 2021</rights><rights>2021. Springer Science+Business Media, LLC, part of Springer Nature.</rights><rights>Springer Science+Business Media, LLC, part of Springer Nature 2021.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c441t-84ccec9f21c41291ea165b42d54c71fb032b67d04aad0eb5051e89615e2026b83</citedby><cites>FETCH-LOGICAL-c441t-84ccec9f21c41291ea165b42d54c71fb032b67d04aad0eb5051e89615e2026b83</cites><orcidid>0000-0002-8473-7514</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10840-021-00954-8$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10840-021-00954-8$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,777,781,27905,27906,41469,42538,51300</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33616879$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Iwakawa, Hidehiro</creatorcontrib><creatorcontrib>Takigawa, Masateru</creatorcontrib><creatorcontrib>Goya, Masahiko</creatorcontrib><creatorcontrib>Iwata, Toyoto</creatorcontrib><creatorcontrib>Martin, Claire A.</creatorcontrib><creatorcontrib>Anzai, Tatsuhiko</creatorcontrib><creatorcontrib>Takahashi, Kunihiko</creatorcontrib><creatorcontrib>Amemiya, Miki</creatorcontrib><creatorcontrib>Yamamoto, Tasuku</creatorcontrib><creatorcontrib>Sekigawa, Masahiro</creatorcontrib><creatorcontrib>Shirai, Yasuhiro</creatorcontrib><creatorcontrib>Tao, Susumu</creatorcontrib><creatorcontrib>Hayashi, Tatsuya</creatorcontrib><creatorcontrib>Takahashi, Yoshihide</creatorcontrib><creatorcontrib>Watanabe, Hiroyuki</creatorcontrib><creatorcontrib>Sasano, Tetsuo</creatorcontrib><title>Clinical implications of local impedance measurement using the IntellaNav MiFi OI ablation catheter: an ex vivo study</title><title>Journal of interventional cardiac electrophysiology</title><addtitle>J Interv Card Electrophysiol</addtitle><addtitle>J Interv Card Electrophysiol</addtitle><description><![CDATA[Purpose
Clinical implication of local impedance (LI) for radiofrequency (RF) ablation has not been fully established. This study aimed to investigate this point using IntellaNav MiFi OI
TM
catheter.
Methods
LI and generator impedance drops (ΔLI and ΔGI) were evaluated in excised porcine hearts (
N
= 16) during RF applications at a range of powers (30 and 50 W), contact forces (5–40 g), and durations (10–180 s) using perpendicular or parallel catheter orientation. Additionally, temporal LI changes were assessed.
Results
Of the 240 lesions without steam pops (92.3%), ΔLI showed better correlations with lesion surface area (
ρ
= 0.55 vs 0.36,
P
= 0.004), maximum depth (
ρ
= 0.53 vs 0.14,
P
< 0.001), and lesion volume (
ρ
= 0.64 vs 0.23,
P
< 0.001) than ΔGI. Furthermore, %LI-drop (ΔLI/initial LI) demonstrated stronger correlations with lesion surface area (
ρ
= 0.60 vs 0.55,
P
< 0.001), maximum depth (
ρ
= 0.57 vs 0.53,
P
< 0.001), and volume (
ρ
= 0.69 vs 0.64,
P
< 0.001) than ΔLI. Parallel catheter orientation improved correlation of ΔLI with lesion surface area (
ρ
= 0.63 vs 0.40,
P
= 0.015) and depth (
ρ
= 0.68 vs 0.45,
P
= 0.008) and created a larger surface lesion (36.3[29.2–42.7] mm
2
vs 28.8[21.6–34.2] mm
2
,
P
< 0.001) than the perpendicular. LI of the lesions significantly differed between baseline, immediately after RF, and 5 min after (
P
< 0.01). LI reaching plateau, larger initial LI, ΔLI, and %LI-drop, and larger RF power and longer duration were observed in pop lesions (
P
< 0.05).
Conclusions
%LI-drop demonstrated a better correlation with lesion size than ΔLI. LI may be used as an additional parameter to predict lesion size and steam pops. Temporal variation and catheter orientation should be considered to interpret LI.]]></description><subject>Ablation</subject><subject>Animals</subject><subject>Cardiology</subject><subject>Catheter Ablation</subject><subject>Catheters</subject><subject>Contact force</subject><subject>Correlation</subject><subject>Electric Impedance</subject><subject>Impedance</subject><subject>Impedance measurement</subject><subject>Lesions</subject><subject>Medical instruments</subject><subject>Medicine</subject><subject>Medicine & Public Health</subject><subject>Orientation</subject><subject>Radio frequency</subject><subject>Steam</subject><subject>Surface area</subject><subject>Swine</subject><subject>Temporal variations</subject><subject>Therapeutic Irrigation</subject><issn>1383-875X</issn><issn>1572-8595</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><recordid>eNp9kMtOwzAQRS0E4v0DLJAl1gE_E4cdqnhUAroBiZ3lOBMwSpxiJxX9e0xbYMfKI8-ZM5qL0Akl55SQ4iJSogTJCKMZIaUUmdpC-1QWLFOylNup5opnqpAve-ggxneSKMLyXbTHeU5zVZT7aJy0zjtrWuy6eZuKwfU-4r7Bbb_5hdp4C7gDE8cAHfgBj9H5Vzy8AZ76AdrWPJoFfnA3Ds-m2FTtyoKT7A0GCJfYeAyfeOEWPY7DWC-P0E5j2gjHm_cQPd9cP03usvvZ7XRydZ9ZIeiQKWEt2LJh1ArKSgqG5rISrJbCFrSpCGdVXtREGFMTqCSRFFSZUwks3VkpfojO1t556D9GiIN-78fg00rNcloSmXNeJoqtKRv6GAM0eh5cZ8JSU6K_k9brpHVKWq-S1t_q0416rDqof0d-ok0AXwMxtfwrhL_d_2i_AHc6ia4</recordid><startdate>20220101</startdate><enddate>20220101</enddate><creator>Iwakawa, Hidehiro</creator><creator>Takigawa, Masateru</creator><creator>Goya, Masahiko</creator><creator>Iwata, Toyoto</creator><creator>Martin, Claire A.</creator><creator>Anzai, Tatsuhiko</creator><creator>Takahashi, Kunihiko</creator><creator>Amemiya, Miki</creator><creator>Yamamoto, Tasuku</creator><creator>Sekigawa, Masahiro</creator><creator>Shirai, Yasuhiro</creator><creator>Tao, Susumu</creator><creator>Hayashi, Tatsuya</creator><creator>Takahashi, Yoshihide</creator><creator>Watanabe, Hiroyuki</creator><creator>Sasano, Tetsuo</creator><general>Springer US</general><general>Springer Nature B.V</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7QO</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8AO</scope><scope>8FD</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>CCPQU</scope><scope>FR3</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>K9.</scope><scope>M0S</scope><scope>M1P</scope><scope>P64</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><orcidid>https://orcid.org/0000-0002-8473-7514</orcidid></search><sort><creationdate>20220101</creationdate><title>Clinical implications of local impedance measurement using the IntellaNav MiFi OI ablation catheter: an ex vivo study</title><author>Iwakawa, Hidehiro ; Takigawa, Masateru ; Goya, Masahiko ; Iwata, Toyoto ; Martin, Claire A. ; Anzai, Tatsuhiko ; Takahashi, Kunihiko ; Amemiya, Miki ; Yamamoto, Tasuku ; Sekigawa, Masahiro ; Shirai, Yasuhiro ; Tao, Susumu ; Hayashi, Tatsuya ; Takahashi, Yoshihide ; Watanabe, Hiroyuki ; Sasano, Tetsuo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c441t-84ccec9f21c41291ea165b42d54c71fb032b67d04aad0eb5051e89615e2026b83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Ablation</topic><topic>Animals</topic><topic>Cardiology</topic><topic>Catheter Ablation</topic><topic>Catheters</topic><topic>Contact force</topic><topic>Correlation</topic><topic>Electric Impedance</topic><topic>Impedance</topic><topic>Impedance measurement</topic><topic>Lesions</topic><topic>Medical instruments</topic><topic>Medicine</topic><topic>Medicine & Public Health</topic><topic>Orientation</topic><topic>Radio frequency</topic><topic>Steam</topic><topic>Surface area</topic><topic>Swine</topic><topic>Temporal variations</topic><topic>Therapeutic Irrigation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Iwakawa, Hidehiro</creatorcontrib><creatorcontrib>Takigawa, Masateru</creatorcontrib><creatorcontrib>Goya, Masahiko</creatorcontrib><creatorcontrib>Iwata, Toyoto</creatorcontrib><creatorcontrib>Martin, Claire A.</creatorcontrib><creatorcontrib>Anzai, Tatsuhiko</creatorcontrib><creatorcontrib>Takahashi, Kunihiko</creatorcontrib><creatorcontrib>Amemiya, Miki</creatorcontrib><creatorcontrib>Yamamoto, Tasuku</creatorcontrib><creatorcontrib>Sekigawa, Masahiro</creatorcontrib><creatorcontrib>Shirai, Yasuhiro</creatorcontrib><creatorcontrib>Tao, Susumu</creatorcontrib><creatorcontrib>Hayashi, Tatsuya</creatorcontrib><creatorcontrib>Takahashi, Yoshihide</creatorcontrib><creatorcontrib>Watanabe, Hiroyuki</creatorcontrib><creatorcontrib>Sasano, Tetsuo</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Biotechnology Research Abstracts</collection><collection>Health & Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Medical Database (Alumni Edition)</collection><collection>ProQuest Pharma Collection</collection><collection>Technology Research Database</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central</collection><collection>ProQuest One Community College</collection><collection>Engineering Research Database</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>Medical Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><jtitle>Journal of interventional cardiac electrophysiology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Iwakawa, Hidehiro</au><au>Takigawa, Masateru</au><au>Goya, Masahiko</au><au>Iwata, Toyoto</au><au>Martin, Claire A.</au><au>Anzai, Tatsuhiko</au><au>Takahashi, Kunihiko</au><au>Amemiya, Miki</au><au>Yamamoto, Tasuku</au><au>Sekigawa, Masahiro</au><au>Shirai, Yasuhiro</au><au>Tao, Susumu</au><au>Hayashi, Tatsuya</au><au>Takahashi, Yoshihide</au><au>Watanabe, Hiroyuki</au><au>Sasano, Tetsuo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Clinical implications of local impedance measurement using the IntellaNav MiFi OI ablation catheter: an ex vivo study</atitle><jtitle>Journal of interventional cardiac electrophysiology</jtitle><stitle>J Interv Card Electrophysiol</stitle><addtitle>J Interv Card Electrophysiol</addtitle><date>2022-01-01</date><risdate>2022</risdate><volume>63</volume><issue>1</issue><spage>185</spage><epage>195</epage><pages>185-195</pages><issn>1383-875X</issn><eissn>1572-8595</eissn><abstract><![CDATA[Purpose
Clinical implication of local impedance (LI) for radiofrequency (RF) ablation has not been fully established. This study aimed to investigate this point using IntellaNav MiFi OI
TM
catheter.
Methods
LI and generator impedance drops (ΔLI and ΔGI) were evaluated in excised porcine hearts (
N
= 16) during RF applications at a range of powers (30 and 50 W), contact forces (5–40 g), and durations (10–180 s) using perpendicular or parallel catheter orientation. Additionally, temporal LI changes were assessed.
Results
Of the 240 lesions without steam pops (92.3%), ΔLI showed better correlations with lesion surface area (
ρ
= 0.55 vs 0.36,
P
= 0.004), maximum depth (
ρ
= 0.53 vs 0.14,
P
< 0.001), and lesion volume (
ρ
= 0.64 vs 0.23,
P
< 0.001) than ΔGI. Furthermore, %LI-drop (ΔLI/initial LI) demonstrated stronger correlations with lesion surface area (
ρ
= 0.60 vs 0.55,
P
< 0.001), maximum depth (
ρ
= 0.57 vs 0.53,
P
< 0.001), and volume (
ρ
= 0.69 vs 0.64,
P
< 0.001) than ΔLI. Parallel catheter orientation improved correlation of ΔLI with lesion surface area (
ρ
= 0.63 vs 0.40,
P
= 0.015) and depth (
ρ
= 0.68 vs 0.45,
P
= 0.008) and created a larger surface lesion (36.3[29.2–42.7] mm
2
vs 28.8[21.6–34.2] mm
2
,
P
< 0.001) than the perpendicular. LI of the lesions significantly differed between baseline, immediately after RF, and 5 min after (
P
< 0.01). LI reaching plateau, larger initial LI, ΔLI, and %LI-drop, and larger RF power and longer duration were observed in pop lesions (
P
< 0.05).
Conclusions
%LI-drop demonstrated a better correlation with lesion size than ΔLI. LI may be used as an additional parameter to predict lesion size and steam pops. Temporal variation and catheter orientation should be considered to interpret LI.]]></abstract><cop>New York</cop><pub>Springer US</pub><pmid>33616879</pmid><doi>10.1007/s10840-021-00954-8</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0002-8473-7514</orcidid></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1383-875X |
| ispartof | Journal of interventional cardiac electrophysiology, 2022-01, Vol.63 (1), p.185-195 |
| issn | 1383-875X 1572-8595 |
| language | eng |
| recordid | cdi_proquest_journals_2619056339 |
| source | MEDLINE; Springer Nature - Complete Springer Journals |
| subjects | Ablation Animals Cardiology Catheter Ablation Catheters Contact force Correlation Electric Impedance Impedance Impedance measurement Lesions Medical instruments Medicine Medicine & Public Health Orientation Radio frequency Steam Surface area Swine Temporal variations Therapeutic Irrigation |
| title | Clinical implications of local impedance measurement using the IntellaNav MiFi OI ablation catheter: an ex vivo study |
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