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An alternating QRS: How does it go even though it's pretty slow?

Abstract
We present the case of a 42 year old patient with a history of childhood lymphoma treated with chemotherapy and radiation who underwent combined aortic and mitral valve replacements and who postoperatively developed an interesting ECG which showed complete heart block and an alternating left bundle branch and narrow complex QRS pattern at a heart rate of 69 beats per minute (bpm). We discuss potential mechanisms for this interesting pattern.
AuthorsEmily Ong, Eric Grubman, Lynda E Rosenfeld
JournalJournal of electrocardiology (J Electrocardiol) 2023 Nov-Dec Vol. 81 Pg. 214-217 ISSN: 1532-8430 [Electronic] United States
PMID37832325 (Publication Type: Case Reports, Journal Article)
CopyrightCopyright © 2023 Elsevier Inc. All rights reserved.
Topics
  • Humans
  • Adult
  • Bundle-Branch Block
  • Electrocardiography
  • Heart Conduction System
  • Atrioventricular Block
  • Heart Rate

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