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Conservative Management of Left Atrial Dissection and Associated Complete Heart Block Following Cardiac Surgery.
Drew Bidmead1, Jose A Madrazo2, Lena Mathews2
1Johns Hopkins School of Medicine, Baltimore, Maryland, USA.
JACC. Case Reports
|June 6, 2025
Summary
Left atrial dissection, a rare complication after mitral valve surgery, can cause complete heart block. A conservative approach may be suitable unless hemodynamic instability occurs.
Area of Science:
- Cardiovascular Surgery
- Cardiac Electrophysiology
Background:
- Left atrial (LA) dissection is a rare but serious complication, predominantly following mitral valve surgery.
- Mitral annular calcification debridement during surgery can contribute to LA dissection.
Observation:
- A case of a patient with chest pain and presyncope post-cardiac surgery was diagnosed with LA dissection and complete heart block.
- The patient required a permanent pacemaker due to recurrent complete heart block.
Findings:
- LA dissection can lead to complete heart block, potentially by damaging the atrioventricular node in the interatrial septum.
- Complete heart block is an uncommonly reported complication of LA dissection.
Implications:
- While hemodynamic instability necessitates urgent surgical repair, a conservative management strategy may be appropriate for LA dissection without instability.
- This case highlights the potential for complete heart block as a complication of LA dissection and the feasibility of conservative management in select cases.
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