{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T15:55:02Z","timestamp":1753890902604,"version":"3.41.2"},"reference-count":7,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2021,8,23]],"date-time":"2021-08-23T00:00:00Z","timestamp":1629676800000},"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><jats:bold>Introduction:<\/jats:bold> It is rare to find that wide QRS tachycardia automatically changes to narrow QRS tachycardia, and it is more difficult to clarify the mechanism.<\/jats:p><jats:p><jats:bold>Case Report:<\/jats:bold> A 3-month-old infant with recurrent paroxysmal supraventricular tachycardia underwent transesophageal cardiac electrophysiological examination. The wide QRS tachycardia was induced by atrial RS<jats:sub>2<\/jats:sub> stimulation, and it soon changed to narrow QRS tachycardia automatically. By the accurate measurement of esophageal lead, it was found that the electrocardiogram changes completely conform to Coumel law. The mechanism of wide and narrow QRS tachycardia was orthodromic atrioventricular reentrant tachycardia with or without ipsilateral functional bundle branch block, and the accessory pathway was defined as the left free wall-concealed accessory pathway.<\/jats:p><jats:p><jats:bold>Conclusion:<\/jats:bold> Transesophageal cardiac electrophysiological examination can reveal some special electrophysiological phenomena, and its non-invasive nature is especially suitable for infants.<\/jats:p>","DOI":"10.3389\/fcvm.2021.722376","type":"journal-article","created":{"date-parts":[[2021,8,23]],"date-time":"2021-08-23T12:48:56Z","timestamp":1629722936000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Case Report: Wide-to-Narrow QRS Tachycardia in a 3-Month-Old Infant"],"prefix":"10.3389","volume":"8","author":[{"given":"Liang","family":"Zhao","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Song","family":"Yan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tao","family":"Wang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yimin","family":"Hua","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kaiyu","family":"Zhou","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1965","published-online":{"date-parts":[[2021,8,23]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"1649","DOI":"10.1161\/01.CIR.83.5.1649","article-title":"A new approach to the differential diagnosis of a regular tachycardia with a wide QRS complex","volume":"83","author":"Brugada","year":"1991","journal-title":"Circulation"},{"key":"B2","doi-asserted-by":"publisher","first-page":"431","DOI":"10.1016\/j.hrthm.2019.09.021","article-title":"Simple electrocardiographic criteria for rapid identification of wide QRS complex tachycardia: the new limb lead algorithm","volume":"17","author":"Chen","year":"2020","journal-title":"Heart Rhythm."},{"key":"B3","doi-asserted-by":"publisher","first-page":"1560","DOI":"10.1111\/jce.14508","article-title":"Supraventricular tachycardia with QRS alternans: what is the mechanism?","volume":"31","author":"Otsuka","year":"2020","journal-title":"J Cardiovasc Electrophysiol."},{"key":"B4","doi-asserted-by":"publisher","first-page":"550","DOI":"10.1111\/jce.14334","article-title":"An unexpected ventriculoatrial block during the parahisian pacing maneuver and the retrograde gap phenomenon","volume":"31","author":"Kara","year":"2020","journal-title":"J Cardiovasc Electrophysiol."},{"key":"B5","doi-asserted-by":"publisher","first-page":"487","DOI":"10.1111\/jce.13417","article-title":"Wide to narrow complex tachycardia: what is the diagnosis?","volume":"29","author":"Rohit","year":"2018"},{"key":"B6","doi-asserted-by":"publisher","first-page":"1698","DOI":"10.1016\/j.hrthm.2015.02.009","article-title":"Wide QRS tachycardia changing to a narrow QRS tachycardia. What is the mechanism?","volume":"12","author":"Bohora","year":"2015","journal-title":"Heart Rhythm"},{"key":"B7","doi-asserted-by":"publisher","first-page":"734","DOI":"10.7499\/j.issn.1008-8830.2018.09.008","article-title":"Value of transesophageal atrial pacing in neonates with tachyarrhythmia","volume":"20","author":"Chen","year":"2018","journal-title":"Zhongguo Dang Dai Er Ke Za Zhi."}],"container-title":["Frontiers in Cardiovascular Medicine"],"original-title":[],"link":[{"URL":"https:\/\/www.frontiersin.org\/articles\/10.3389\/fcvm.2021.722376\/full","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2021,8,23]],"date-time":"2021-08-23T12:48:59Z","timestamp":1629722939000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.frontiersin.org\/articles\/10.3389\/fcvm.2021.722376\/full"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,8,23]]},"references-count":7,"alternative-id":["10.3389\/fcvm.2021.722376"],"URL":"https:\/\/doi.org\/10.3389\/fcvm.2021.722376","relation":{},"ISSN":["2297-055X"],"issn-type":[{"type":"electronic","value":"2297-055X"}],"subject":[],"published":{"date-parts":[[2021,8,23]]},"article-number":"722376"}}