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Related Experiment Videos

Intravascular stent prosthesis for right ventricular outflow obstruction.

M C Hosking1, L N Benson, T Nakanishi

  • 1Department of Pediatrics, Hospital for Sick Children, Toronto, Ontario, Canada.

Journal of the American College of Cardiology
|August 1, 1992
PubMed
Summary

Balloon-expandable stents effectively treated right ventricular outflow obstruction in children with congenital heart disease, improving pulmonary artery stenosis and conduit obstruction. This shows stenting is a valuable tool for pediatric cardiovascular care.

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Area of Science:

  • Pediatric Cardiology
  • Interventional Cardiology
  • Congenital Heart Disease Management

Background:

  • Intravascular stenting is established for adult vascular disease.
  • Limited data exists for pediatric applications, especially in right ventricular outflow obstruction.
  • Balloon angioplasty may be insufficient for complex pediatric obstructions.

Purpose of the Study:

  • To evaluate the efficacy of balloon-expandable stents.
  • To assess impact on right ventricular outflow obstruction in pediatric congenital heart disease.
  • To determine safety and outcomes of stenting in this population.

Main Methods:

  • Implantation of 24 stainless steel stents in 17 pediatric patients.
  • Stents placed in right ventricular to pulmonary artery conduits, branch pulmonary arteries, and aortopulmonary collateral vessels.

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  • Follow-up included hemodynamic and angiographic assessment up to 14 months.

    • Main Results:

    • Successful stent placement in 22 of 24 cases; no embolization or thrombosis.
    • Significant reduction in RV-to-PA conduit gradients (85 to 35 mm Hg).
    • Pulmonary artery stenosis showed marked diameter increase (92%) and gradient reduction (22 to 3 mm Hg), with clinical improvement in 10/11 patients.

    Conclusions:

    • Intravascular stenting is a safe and effective adjunct for managing pediatric congenital heart disease.
    • Stenting significantly improves obstruction in RV-to-PA conduits and pulmonary arteries.
    • Further research is warranted to establish long-term outcomes.