{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,8]],"date-time":"2026-01-08T11:06:22Z","timestamp":1767870382701,"version":"3.49.0"},"reference-count":13,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,1,8]],"date-time":"2026-01-08T00:00:00Z","timestamp":1767830400000},"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. Physiol."],"abstract":"<jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Transient left bundle branch block (LBBB) is associated with various cardiac and systemic conditions, including exercise-induced ischemia. However, normalization of baseline LBBB following exertion is a rare and poorly understood phenomenon.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Case Summary<\/jats:title>\n                    <jats:p>We report the case of an 83-year-old male with longstanding coronary artery disease and baseline LBBB who underwent a routine stress echocardiogram. During the recovery phase, ECG monitoring revealed normalization of LBBB with first-degree AV block. Concurrent stress echocardiography showed improved segmental and global ventricular function.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>This case highlights a rare instance of post-exercise resolution of LBBB and suggests a possible link between exercise-induced autonomic modulation and transient improvement in conduction. Further research is warranted to explore the prognostic significance of this finding in patients with structural heart disease.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3389\/fphys.2025.1745858","type":"journal-article","created":{"date-parts":[[2026,1,8]],"date-time":"2026-01-08T06:33:50Z","timestamp":1767854030000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Case Report: Exercise-induced normalization of chronic left bundle branch block: a rare recovery-phase phenomenon"],"prefix":"10.3389","volume":"16","author":[{"given":"Horesh","family":"Dor-haim","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ilia","family":"Davarashvili","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1965","published-online":{"date-parts":[[2026,1,8]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"730","DOI":"10.1161\/01.CIR.29.5.730","article-title":"Transient bundle\u2010branch block","volume":"29","author":"Bauer","year":"1964","journal-title":"Circulation"},{"key":"B2","doi-asserted-by":"publisher","first-page":"118","DOI":"10.1016\/S0972-6292(16)30742-6","article-title":"The link in linking","volume":"13","author":"Caldwell","year":"2013","journal-title":"Indian Pacing Electrophysiol. 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Heart J."},{"key":"B3","doi-asserted-by":"publisher","first-page":"e66658","DOI":"10.1371\/journal.pone.0066658","article-title":"Reduced ventricular arrhythmogenicity and increased electrical complexity in exercised rats","volume":"8","author":"Dor-Haim","year":"2013","journal-title":"PLoS One"},{"key":"B4","doi-asserted-by":"publisher","first-page":"e0267888","DOI":"10.1371\/journal.pone.0267888","article-title":"Intermittent aerobic-resistance vs. continuous aerobic training: cardiac electrophysiologic improvement","volume":"17","author":"Dor-Haim","year":"2022","journal-title":"PLoS One"},{"key":"B5","doi-asserted-by":"publisher","first-page":"143","DOI":"10.1054\/jelc.2002.123482","article-title":"Intermittent LBBB due to \u201clinking\u201d phenomenon","volume":"35","author":"Erdogan","year":"2002","journal-title":"J. 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Outcomes"},{"key":"B11","doi-asserted-by":"publisher","first-page":"26","DOI":"10.1590\/S0066-782X2011005000066","article-title":"Exercise\u2010induced left bundle branch block: prevalence and prognosis","volume":"97","author":"Stein","year":"2011","journal-title":"Arq. Bras. Cardiol."},{"key":"B12","doi-asserted-by":"publisher","first-page":"1","DOI":"10.1007\/s00421-013-2742-4","article-title":"Cardiac electrical conduction, autonomic activity, and biomarker release post exercise","volume":"114","author":"Stewart","year":"2014","journal-title":"Eur. J. Appl. Physiol."},{"key":"B13","doi-asserted-by":"publisher","first-page":"85","DOI":"10.1016\/0167-5273(94)90119-8","article-title":"Intermittent LBBB and diastolic dysfunction: a case report","volume":"46","author":"Xiao","year":"1994","journal-title":"Int. J. Cardiol."}],"container-title":["Frontiers in Physiology"],"original-title":[],"link":[{"URL":"https:\/\/www.frontiersin.org\/articles\/10.3389\/fphys.2025.1745858\/full","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,1,8]],"date-time":"2026-01-08T06:33:51Z","timestamp":1767854031000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.frontiersin.org\/articles\/10.3389\/fphys.2025.1745858\/full"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,1,8]]},"references-count":13,"alternative-id":["10.3389\/fphys.2025.1745858"],"URL":"https:\/\/doi.org\/10.3389\/fphys.2025.1745858","relation":{},"ISSN":["1664-042X"],"issn-type":[{"value":"1664-042X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,1,8]]},"article-number":"1745858"}}