{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T09:39:46Z","timestamp":1777628386615,"version":"3.51.4"},"reference-count":17,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2026,2,4]],"date-time":"2026-02-04T00:00:00Z","timestamp":1770163200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"},{"start":{"date-parts":[[2026,2,4]],"date-time":"2026-02-04T00:00:00Z","timestamp":1770163200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Pacing Clinical Electrophis"],"published-print":{"date-parts":[[2026,5]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Catheter ablation in pediatric patients remains technically challenging. The RHYTHMIA high\u2010density mapping system is increasingly used in pediatric electrophysiology; however, procedural experience in patients weighing less than 20\u00a0kg is limited.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      We retrospectively analyzed 125 pediatric patients who underwent catheter ablation for supraventricular arrhythmias using the RHYTHMIA system. The patients were divided into two groups according to body weight: \u226520\u00a0kg group (\n                      <jats:italic>n<\/jats:italic>\n                      = 111) and the &lt;20\u00a0kg group (\n                      <jats:italic>n<\/jats:italic>\n                      = 14). The mapping time, number of mapping beats, and mapping electrodes were compared for the right atrium (RA), and left atrium (LA), along with the manual re\u2010annotation points and incidence of complications.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      A total of 184 maps were analyzed. No significant differences were found in mapping time, accepted beats, and electrograms (RA, \u226520\u00a0kg group [\n                      <jats:italic>n<\/jats:italic>\n                      = 104] vs. &lt;20\u00a0kg group [\n                      <jats:italic>n<\/jats:italic>\n                      = 11]; mapping time, 13.8 min[10.1\u201318.3] vs. 17.4 min[9.4\u201325.3],\n                      <jats:italic>p<\/jats:italic>\n                      = 0.95; accepted beats, 744 beats[548\u20131095] vs. 953 beats[654\u20131079],\n                      <jats:italic>p<\/jats:italic>\n                      = 0.57; electrograms, 6871 electrograms[5074\u201310885] vs. 6650 electrograms[4474\u20139527],\n                      <jats:italic>p<\/jats:italic>\n                      = 0.30) (LA, \u226520\u00a0kg group [\n                      <jats:italic>n<\/jats:italic>\n                      = 62] vs. &lt;20\u00a0kg group [\n                      <jats:italic>n<\/jats:italic>\n                      = 7]; mapping time, 11.5 min[8.1\u201318.3] vs. 14.5 min[8.5\u201315.4],\n                      <jats:italic>p<\/jats:italic>\n                      = 0.97; accepted beats, 619 beats[354\u20131007] vs. 512 beats[316\u2013810],\n                      <jats:italic>p<\/jats:italic>\n                      = 0.89; electrograms, 6809 electrograms[4025\u201310108] vs. 4338 electrograms[3369\u20138693],\n                      <jats:italic>p<\/jats:italic>\n                      = 0.93). In the RA, &lt;20\u00a0kg group required more re\u2010annotations than \u226520\u00a0kg group, while no significant differences in complications were observed between the groups.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Use of the RHYTHMIA mapping system in carefully selected pediatric patients weighing less than 20\u00a0kg was technically feasible and not associated with major procedural complications. These findings support its cautious use with appropriate case selection and operator vigilance.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/pace.70151","type":"journal-article","created":{"date-parts":[[2026,2,5]],"date-time":"2026-02-05T06:35:24Z","timestamp":1770273324000},"page":"523-530","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Technical Feasibility of the RHYTHMIA Mapping System in Pediatric Patients Weighing Less Than 20Kg"],"prefix":"10.1111","volume":"49","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1418-6566","authenticated-orcid":false,"given":"Wataru","family":"Sasaki","sequence":"first","affiliation":[{"name":"Department of Cardiology Saitama Medical University International Medical Center  Saitama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1642-6968","authenticated-orcid":false,"given":"Taisuke","family":"Nabeshima","sequence":"additional","affiliation":[{"name":"Department of Pediatric Cardiology Saitama Medical University International Medical Center  Saitama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kouta","family":"Nagaoka","sequence":"additional","affiliation":[{"name":"Department of Pediatric Cardiology Saitama Medical University International Medical Center  Saitama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1172-2995","authenticated-orcid":false,"given":"Hitoshi","family":"Mori","sequence":"additional","affiliation":[{"name":"Department of Cardiology Saitama Medical University International Medical Center  Saitama Japan"},{"name":"Department of Pediatric Cardiology Saitama Medical University International Medical Center  Saitama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3347-6772","authenticated-orcid":false,"given":"Daisuke","family":"Kudo","sequence":"additional","affiliation":[{"name":"Department of Cardiology Saitama Medical University International Medical Center  Saitama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Naomichi","family":"Tanaka","sequence":"additional","affiliation":[{"name":"Department of Cardiology Saitama Medical University International Medical Center  Saitama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tsukasa","family":"Naganuma","sequence":"additional","affiliation":[{"name":"Department of Cardiology Saitama Medical University International Medical Center  Saitama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masataka","family":"Narita","sequence":"additional","affiliation":[{"name":"Department of Cardiology Saitama Medical University International Medical Center  Saitama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5648-8135","authenticated-orcid":false,"given":"Kazuhisa","family":"Matsumoto","sequence":"additional","affiliation":[{"name":"Department of Cardiology Saitama Medical University International Medical Center  Saitama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yoshifumi","family":"Ikeda","sequence":"additional","affiliation":[{"name":"Department of Cardiology Saitama Medical University International Medical Center  Saitama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Naokata","family":"Sumitomo","sequence":"additional","affiliation":[{"name":"Department of Pediatric Cardiology Saitama Medical University International Medical Center  Saitama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kazuo","family":"Matsumoto","sequence":"additional","affiliation":[{"name":"Department of Cardiology Higashimatsuyama Medical Association Hospital  Higashimatsuyama Saitama Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9989-8708","authenticated-orcid":false,"given":"Ritsushi","family":"Kato","sequence":"additional","affiliation":[{"name":"Department of Cardiology Saitama Medical University International Medical Center  Saitama 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Nankodo; Monma Kazuo Suzuki Shin Koyanagi Jin."},{"key":"e_1_2_12_14_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00246-017-1766-7"},{"key":"e_1_2_12_15_1","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9149(92)90858-V"},{"key":"e_1_2_12_16_1","doi-asserted-by":"publisher","DOI":"10.1093\/europace\/euy188"},{"key":"e_1_2_12_17_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jacep.2019.08.001"},{"key":"e_1_2_12_18_1","doi-asserted-by":"publisher","DOI":"10.1002\/joa3.12238"}],"container-title":["Pacing and Clinical Electrophysiology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/pace.70151","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1111\/pace.70151","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/pace.70151","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T01:39:41Z","timestamp":1777426781000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/pace.70151"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,2,4]]},"references-count":17,"journal-issue":{"issue":"5","published-print":{"date-parts":[[2026,5]]}},"alternative-id":["10.1111\/pace.70151"],"URL":"https:\/\/doi.org\/10.1111\/pace.70151","archive":["Portico"],"relation":{},"ISSN":["0147-8389","1540-8159"],"issn-type":[{"value":"0147-8389","type":"print"},{"value":"1540-8159","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,2,4]]},"assertion":[{"value":"2025-02-04","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-01-27","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-02-04","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}