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Related Experiment Videos

Systemic ventricular outflow obstruction progresses after the Fontan operation

K M Finta1, R H Beekman, F M Lupinetti

  • 1Division of Pediatric Cardiology, C. S. Mott Children's Hospital, University of Michigan, Ann Arbor.

The Annals of Thoracic Surgery
|October 1, 1994
PubMed
Summary
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Systemic ventricular outflow obstruction is a common and progressive complication following the Fontan operation. Early identification and monitoring are crucial for managing this condition in pediatric cardiac surgery patients.

Area of Science:

  • Pediatric Cardiology
  • Congenital Heart Disease Surgery
  • Cardiac Physiology

Background:

  • The Fontan operation is a palliative procedure for complex single-ventricle congenital heart defects.
  • Systemic ventricular outflow obstruction (SVOO) is a potential complication after cardiac surgeries.
  • Long-term outcomes and progression of SVOO post-Fontan require further evaluation.

Purpose of the Study:

  • To assess the incidence and natural history of systemic ventricular outflow obstruction after the Fontan procedure.
  • To identify risk factors associated with the development of SVOO post-Fontan.
  • To understand the progression of SVOO in survivors of the Fontan operation.

Main Methods:

  • Retrospective review of medical records for 57 hospital survivors of the Fontan operation.

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  • Categorization of patients into those with (Group 1) and without (Group 2) ventricular outflow obstruction.
  • Comparison of demographic, surgical, and echocardiographic data between groups.

    • Main Results:

    • Systemic ventricular outflow obstruction was identified in 12% of patients (7 of 57).
    • In Group 1, outflow gradients significantly increased from pre-Fontan (6.3 mmHg) to 28 months postoperatively (80.1 mmHg).
    • Patients with SVOO were more likely to have an aorta arising from a hypoplastic ventricle and prior pulmonary artery banding.

    Conclusions:

    • Systemic ventricular outflow obstruction is a common (12% incidence) and progressive complication after the Fontan procedure.
    • Prior pulmonary artery banding and aortic origin from a hypoplastic ventricle are associated with SVOO post-Fontan.
    • The progressive nature of SVOO necessitates vigilant monitoring in Fontan survivors.