{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,9]],"date-time":"2026-10-09T09:19:15Z","timestamp":1791537555232,"version":"4.3.4"},"reference-count":46,"publisher":"Oxford University Press (OUP)","issue":"9","license":[{"start":{"date-parts":[[2023,9,15]],"date-time":"2023-09-15T00:00:00Z","timestamp":1694736000000},"content-version":"vor","delay-in-days":44,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["DO637\/22-3"],"award-info":[{"award-number":["DO637\/22-3"]}],"id":[{"id":"10.13039\/501100001659","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003542","name":"Ministerium f\u00fcr Wissenschaft, Forschung und Kunst Baden-W\u00fcrttemberg","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100003542","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Research Seed Capital"},{"DOI":"10.13039\/100004374","name":"Medtronic","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100004374","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,8,2]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Aims<\/jats:title>\n                    <jats:p>Electro-anatomical voltage, conduction velocity (CV) mapping, and late gadolinium enhancement (LGE) magnetic resonance imaging (MRI) have been correlated with atrial cardiomyopathy (ACM). However, the comparability between these modalities remains unclear. This study aims to (i) compare pathological substrate extent and location between current modalities, (ii) establish spatial histograms in a cohort, (iii) develop a new estimated optimized image intensity threshold (EOIIT) for LGE-MRI identifying patients with ACM, (iv) predict rhythm outcome after pulmonary vein isolation (PVI) for persistent atrial fibrillation (AF).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods and results<\/jats:title>\n                    <jats:p>Thirty-six ablation-naive persistent AF patients underwent LGE-MRI and high-definition electro-anatomical mapping in sinus rhythm. Late gadolinium enhancement areas were classified using the UTAH, image intensity ratio (IIR &amp;gt;1.20), and new EOIIT method for comparison to low-voltage substrate (LVS) and slow conduction areas &amp;lt;0.2\u2005m\/s. Receiver operating characteristic analysis was used to determine LGE thresholds optimally matching LVS. Atrial cardiomyopathy was defined as LVS extent \u22655% of the left atrium (LA) surface at &amp;lt;0.5\u2005mV. The degree and distribution of detected pathological substrate (percentage of individual LA surface are) varied significantly (P &amp;lt; 0.001) across the mapping modalities: 10% (interquartile range 0\u201314%) of the LA displayed LVS &amp;lt;0.5\u2005mV vs. 7% (0\u201312%) slow conduction areas &amp;lt;0.2\u2005m\/s vs. 15% (8\u201323%) LGE with the UTAH method vs. 13% (2\u201323%) using IIR &amp;gt;1.20, with most discrepancies on the posterior LA. Optimized image intensity thresholds and each patient\u2019s mean blood pool intensity correlated linearly (R2 = 0.89, P &amp;lt; 0.001). Concordance between LGE-MRI-based and LVS-based ACM diagnosis improved with the novel EOIIT applied at the anterior LA [83% sensitivity, 79% specificity, area under the curve (AUC): 0.89] in comparison to the UTAH method (67% sensitivity, 75% specificity, AUC: 0.81) and IIR &amp;gt;1.20 (75% sensitivity, 62% specificity, AUC: 0.67).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Discordances in detected pathological substrate exist between LVS, CV, and LGE-MRI in the LA, irrespective of the LGE detection method. The new EOIIT method improves concordance of LGE-MRI-based ACM diagnosis with LVS in ablation-naive AF patients but discrepancy remains particularly on the posterior wall. All methods may enable the prediction of rhythm outcomes after PVI in patients with persistent AF.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1093\/europace\/euad278","type":"journal-article","created":{"date-parts":[[2023,9,12]],"date-time":"2023-09-12T01:15:47Z","timestamp":1694481347000},"source":"Crossref","is-referenced-by-count":40,"title":["Differences in atrial substrate localization using late gadolinium enhancement-magnetic resonance imaging, electrogram voltage, and conduction velocity: a cohort study using a consistent anatomical reference frame in patients with persistent atrial fibrillation"],"prefix":"10.1093","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8279-7209","authenticated-orcid":false,"given":"Deborah","family":"Nairn","sequence":"first","affiliation":[{"name":"Institute of Biomedical Engineering, Karlsruhe Institute of Technology (KIT) , Fritz-Haber-Weg 1, Karlsruhe 76131 , 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Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4193-7257","authenticated-orcid":false,"given":"Claudia","family":"Nagel","sequence":"additional","affiliation":[{"name":"Institute of Biomedical Engineering, Karlsruhe Institute of Technology (KIT) , Fritz-Haber-Weg 1, Karlsruhe 76131 , Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2919-4617","authenticated-orcid":false,"given":"Luca","family":"Azzolin","sequence":"additional","affiliation":[{"name":"Institute of Biomedical Engineering, Karlsruhe Institute of Technology (KIT) , Fritz-Haber-Weg 1, Karlsruhe 76131 , Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1531-4814","authenticated-orcid":false,"given":"Giorgio","family":"Luongo","sequence":"additional","affiliation":[{"name":"Institute of Biomedical Engineering, Karlsruhe Institute of Technology (KIT) , 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