{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,15]],"date-time":"2026-09-15T00:40:17Z","timestamp":1789432817148,"version":"build-2803163510"},"reference-count":20,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2023,10,23]],"date-time":"2023-10-23T00:00:00Z","timestamp":1698019200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Cardiovasc electrophysiol"],"published-print":{"date-parts":[[2024,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>RETRO\u2010mapping was developed to automate activation mapping of atrial fibrillation (AF). We used the algorithm to study the effect of pulmonary vein isolation (PVI) on the frequency of focal, planar, and colliding wavefronts in persistent AF. An AFocusII catheter was placed on the left atrial endocardium to record 3\u2009s of AF at six\u00a0sites pre and post\u2010PVI in patients undergoing wide circumferential PVI for persistent AF. RETRO\u2010mapping analyzed each segment in 2\u2009ms time windows for evidence of focal, planar, and colliding waveforms and the automated categorizations manually validated. Ten patients were recruited. A total of 360\u2009s of data in 120 segments of 3\u2009s from 60 left atrial locations were analyzed. RETRO\u2010map was highly effective at identifying focal waves and collisions during AF. PVI significantly reduced collision frequency but not focal and planar activation frequency. However, there was a significant reduction in the dispersion of activation directions. Larger studies may help determine factors associated with successful clinical outcome.<\/jats:p>","DOI":"10.1111\/jce.16116","type":"journal-article","created":{"date-parts":[[2023,10,23]],"date-time":"2023-10-23T11:05:03Z","timestamp":1698059103000},"page":"557-568","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["RETRO\u2010mapping: A novel algorithm automating wavefront categorization using activation mapping during persistent atrial fibrillation demonstrates a reduction in wavefront collisions following pulmonary vein isolation"],"prefix":"10.1111","volume":"35","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9271-2491","authenticated-orcid":false,"given":"Clare","family":"Coyle","sequence":"first","affiliation":[{"name":"Imperial College London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3026-8174","authenticated-orcid":false,"given":"Ilektra","family":"Kanella","sequence":"additional","affiliation":[{"name":"Imperial College London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ian","family":"Mann","sequence":"additional","affiliation":[{"name":"Imperial College London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Norman","family":"Qureshi","sequence":"additional","affiliation":[{"name":"Imperial College London UK"},{"name":"Imperial College Healthcare NHS Trust London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nick W. 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