{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,2]],"date-time":"2026-07-02T07:03:00Z","timestamp":1782975780732,"version":"3.54.5"},"reference-count":8,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,7,2]],"date-time":"2026-07-02T00:00:00Z","timestamp":1782950400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Cardiovasc. Med."],"abstract":"<jats:p>A 58-year-old woman with recurrent paroxysmal atrial fibrillation and a history of cryoablation 3 years prior underwent an electrophysiological study for an irregular narrow complex tachyarrhythmia. The electrocardiogram showed positive P\u2019 waves in all leads except aVR, with the P\u2019 waves separated by large isoelectric intervals, indicating focal atrial tachycardia rather than atypical atrial flutter. High-resolution 3D mapping revealed a focal atrial tachycardia originating from the postero-septal part of the superior vena cava (in close proximity to the right superior pulmonary vein). Three applications at the superior vena cava level terminated the tachycardia and restored sinus rhythm. There were no recurrences. This case underscores the need for high-resolution electrophysiological mapping to identify the arrhythmia origin, especially in patients with prior procedures.<\/jats:p>","DOI":"10.3389\/fcvm.2026.1888774","type":"journal-article","created":{"date-parts":[[2026,7,2]],"date-time":"2026-07-02T05:34:03Z","timestamp":1782970443000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Focal atrial tachycardia from the superior vena cava following atrial fibrillation cryoablation: a case report"],"prefix":"10.3389","volume":"13","author":[{"given":"Radu-Gabriel","family":"Vatasescu","sequence":"first","affiliation":[{"name":"Faculty of Medicine, Carol Davila University of Medicine and Pharmacy","place":["Bucharest, Romania"]},{"name":"Department of Cardiology, Clinical Emergency Hospital of Bucharest","place":["Bucharest, Romania"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gabriela-Elena","family":"Marascu","sequence":"additional","affiliation":[{"name":"Faculty of Medicine, Carol Davila University of Medicine and Pharmacy","place":["Bucharest, Romania"]},{"name":"Department of Cardiology, Clinical Emergency Hospital of Bucharest","place":["Bucharest, Romania"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Viviana Alexandra","family":"Gondos","sequence":"additional","affiliation":[{"name":"Department of Medical Electronics and Informatics, Polytechnic University of Bucharest","place":["Bucharest, Romania"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexandru Ioan","family":"Deaconu","sequence":"additional","affiliation":[{"name":"Faculty of Medicine, Carol Davila University of Medicine and Pharmacy","place":["Bucharest, Romania"]},{"name":"Department of Cardiology, Clinical Emergency Hospital of Bucharest","place":["Bucharest, Romania"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2026,7,2]]},"reference":[{"key":"B1","author":"Markowitz","year":"2019"},{"key":"B2","doi-asserted-by":"publisher","first-page":"54","DOI":"10.15420\/aer.2020.07","article-title":"Atrial tachycardias after atrial fibrillation ablation: how to manage?","volume":"9","author":"Hung","year":"2020","journal-title":"Arrhythmia Electrophysiol Rev"},{"key":"B3","doi-asserted-by":"publisher","first-page":"1351","DOI":"10.1161\/01.CIR.0000141369.50476.D3","article-title":"Mechanisms of organized left atrial tachycardias occurring after pulmonary vein isolation","volume":"110","author":"Gerstenfeld","year":"2004","journal-title":"Circulation"},{"key":"B4","doi-asserted-by":"publisher","first-page":"497","DOI":"10.1016\/j.jjcc.2019.02.006","article-title":"Mechanism, underlying substrate and predictors of atrial tachycardia following atrial fibrillation ablation using the 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