{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T19:35:24Z","timestamp":1786649724811,"version":"build-2736575974"},"reference-count":5,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"4","license":[{"start":{"date-parts":[[2025,10,1]],"date-time":"2025-10-01T00:00:00Z","timestamp":1759276800000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2025,10]]},"abstract":"<jats:p>Alternating bundle branch block (ABBB) is a phenomenon described by the presence of both right bundle branch block (RBBB) and left bundle branch block (LBBB) in the same individual at different points in time. We present the case of a 74-year-old male with known cardiac amyloid who was managed in hospital for an ABBB in the context of an accidental fall. Serial electrocardiograms (ECGs) revealed transient alternating RBBB and LBBB. The patient underwent dual-chamber permanent pacemaker implantation. This case reviews the management of alternating bundle brunch blocks and highlights the complexities of treating conduction disease in patients with cardiac amyloid.<\/jats:p>","DOI":"10.4103\/heartviews.heartviews_91_25","type":"journal-article","created":{"date-parts":[[2026,4,16]],"date-time":"2026-04-16T05:00:12Z","timestamp":1776315612000},"page":"290-292","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":0,"title":["Alternating Right and Left Bundle Branch Block: Management in a Patient with Cardiac Amyloidosis"],"prefix":"10.4103","volume":"26","author":[{"given":"Avitasha","family":"Darshni","sequence":"first","affiliation":[{"name":"Department of Cardiology, The Canberra Hospital, Garran, ACT, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mohammad","family":"Paymard","sequence":"additional","affiliation":[{"name":"Department of Cardiology, The Canberra Hospital, Garran, ACT, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","published-online":{"date-parts":[[2026,4,15]]},"reference":[{"key":"R1-20260416","doi-asserted-by":"crossref","first-page":"615","DOI":"10.4103\/SINGAPOREMEDJ.SMJ-2021-260","article-title":"Now you see it, now you don\u2019t: Alternating bundle branch block and its clinical implications","volume":"63","author":"Chia","year":"2022","journal-title":"Singapore Med J"},{"key":"R2-20260416","doi-asserted-by":"crossref","first-page":"2581","DOI":"10.3390\/jcm12072581","article-title":"Arrhythmic manifestations of cardiac amyloidosis: Challenges in risk stratification and clinical management","volume":"12","author":"Laptseva","year":"2023","journal-title":"J Clin Med"},{"key":"R3-20260416","doi-asserted-by":"crossref","first-page":"140","DOI":"10.1016\/j.amjcard.2020.05.021","article-title":"Prevalence, incidence, and impact on mortality of conduction system disease in transthyretin cardiac amyloidosis","volume":"128","author":"Donnellan","year":"2020","journal-title":"Am J Cardiol"},{"key":"R4-20260416","doi-asserted-by":"crossref","first-page":"257","DOI":"10.1016\/j.tcm.2023.02.006","article-title":"Electrocardiographic features and rhythm disorders in cardiac amyloidosis","volume":"34","author":"Martini","year":"2024","journal-title":"Trends Cardiovasc Med"},{"key":"R5-20260416","doi-asserted-by":"crossref","first-page":"3427","DOI":"10.1093\/eurheartj\/ehab364","article-title":"2021 ESC Guidelines on cardiac pacing and cardiac resynchronization therapy: Developed by the Task Force on cardiac pacing and cardiac resynchronization therapy of the European Society of Cardiology (ESC) with the special contribution of the European Heart Rhythm Association (EHRA)","volume":"42","author":"Glikson","year":"2021","journal-title":"Eur Heart J"}],"container-title":["Heart Views"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.ovid.com\/10.4103\/heartviews.heartviews_91_25","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T18:57:41Z","timestamp":1786647461000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ovid.com\/10.4103\/heartviews.heartviews_91_25"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,10]]},"references-count":5,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2025]]}},"URL":"https:\/\/doi.org\/10.4103\/heartviews.heartviews_91_25","relation":{},"ISSN":["1995-705X","0976-5123"],"issn-type":[{"value":"1995-705X","type":"print"},{"value":"0976-5123","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,10]]},"assertion":[{"value":"2025-07-20","name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2025-10-23","name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}}]}}