Unusual interatrial fistula discovered during device closure of an atrial septal defect

Shannon M. Lyon, Mark H. Hoyer

Research output: Contribution to journalArticle


Atrial septal defect (ASD) closure is a common reason for referral to the cardiac catheterization laboratory. We report a case in which a relatively large Qp:Qs of 1.85:1 was demonstrated in the face of a small secundum ASD. This led to further investigation, ultimately leading to the discovery of an unusual atrial fistula. Rare cases of interatrial tunnels have been described in the literature, however, this is a unique case of a left atrial appendage to right atrial appendage fistula in the setting of a right juxtaposed left atrial appendage.

Original languageEnglish (US)
Pages (from-to)467-470
Number of pages4
JournalCatheterization and Cardiovascular Interventions
Issue number3
StatePublished - Feb 15 2020



  • ASD closure
  • congenital heart disease
  • interventional devices
  • intracardiac echocardiography
  • pediatrics
  • structural heart disease

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine

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