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Histopathological findings in three children with His bundle tachycardia occurring subsequent to cardiac surgery

J A Till1, S Y Ho, E Rowland

  • 1Department of Paediatrics, National Heart and Lung Institute, London.

European Heart Journal
|May 1, 1992
PubMed

Insights

Cardiac surgery complications can lead to His bundle tachycardia in children. Autopsies revealed surgical stitches damaged the atrioventricular bundle, potentially causing fatal arrhythmias.

Area of Science:

  • Cardiovascular Pathology
  • Pediatric Cardiology
  • Electrophysiology

Background:

  • His bundle tachycardia is a rare but serious condition in children.
  • Cardiac surgery carries inherent risks, including potential damage to the heart's conduction system.

Observation:

  • Three pediatric cases of His bundle tachycardia post-cardiac surgery were examined.
  • Autopsies focused on detailed examination of the cardiac conduction system.

Findings:

  • The sinus node remained intact in all cases.
  • Haemorrhagic tracks were observed within the penetrating atrioventricular bundle.
  • These tracks originated from surgical stitches placed near the conduction tissue.

Implications:

  • Surgical technique and stitch placement are critical to avoid damaging the His bundle.
  • Conduction system disruption may create an arrhythmogenic focus, leading to tachycardia.
  • This highlights a potential mechanism for sudden cardiac death following pediatric cardiac surgery.

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