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An alternating QRS: How does it go even though it's pretty slow?
Emily Ong1, Eric Grubman1, Lynda E Rosenfeld1
1Section of Cardiovascular Medicine, Yale University School of Medicine, 333 Cedar St, New Haven, CT 06510, United States of America.
Journal of Electrocardiology
|October 13, 2023
Summary
A patient with a history of lymphoma developed complete heart block and alternating bundle branch patterns after valve replacement surgery. This case highlights unusual electrocardiogram (ECG) findings following cardiac procedures.
Area of Science:
- Cardiology
- Electrophysiology
- Oncology
Background:
- A 42-year-old patient with a history of childhood lymphoma, treated with chemotherapy and radiation, underwent combined aortic and mitral valve replacements.
- Cardiovascular complications can arise in patients with a history of cancer treatment.
Observation:
- Postoperatively, the patient exhibited an unusual electrocardiogram (ECG) pattern.
- The ECG revealed complete heart block with alternating left bundle branch block and narrow complex QRS morphology.
Findings:
- The observed ECG pattern is characterized by a heart rate of 69 beats per minute.
- This specific combination of complete heart block and alternating bundle branch patterns is rarely reported.
Implications:
- Understanding the potential mechanisms behind such complex ECG findings is crucial for patient management.
- This case may inform future cardiac care protocols for cancer survivors.
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