Related Experiment Videos
Transcatheter stent treatment for congenital peripheral pulmonary arterial stenosis
Insights
Transcatheter stent placement effectively treated significant pulmonary arterial stenosis in two pediatric patients with complex congenital heart disease. This minimally invasive approach improved pulmonary artery diameter and reduced pressure gradients, offering a viable alternative to surgery.
Area of Science:
- Cardiology
- Interventional Cardiology
- Pediatric Cardiology
Background:
- Significant residual peripheral pulmonary arterial stenosis can complicate outcomes after surgical correction of congenital heart disease.
- Management of pulmonary arterial stenosis often requires advanced interventional techniques.
Observation:
- Two pediatric patients, one post-tetralogy of Fallot repair and another with D-transposition of great vessels, presented with severe pulmonary arterial stenosis.
- Five Johnson and Johnson stents were successfully implanted using transcatheter techniques.
Findings:
- Stent implantation significantly increased pulmonary artery diameter (6.0 +/- 0.8 mm to 13.5 +/- 1.7 mm) and reduced pressure gradients (33.0 +/- 16.0 mmHg to 10.2 +/- 4.4 mmHg).
- One-year follow-up demonstrated sustained efficacy, with minor residual gradients managed by additional stenting in one patient.
Implications:
- Transcatheter stent placement is a feasible and effective treatment for selected pediatric patients with significant pulmonary arterial stenosis.
- This technique provides a valuable option when surgical correction is not feasible or has residual stenosis.
Abstract:
A total of 5 Johnson and Johnson stents were implanted in two patients with significant residual peripheral pulmonary arterial stenosis. These were a 15-year-old boy with post-open heart surgery for tetralogy of Fallot and a 3 8/12 year-old boy with D-transposition of great vessels. Immediately after balloon dilatation and implantation of the stents, the diameter of the narrowing pulmonary arteries increased significantly from 6.0 +/- 0.8 mm to 13.5 +/- 1.7 mm (P < 0.001) and the systolic pressure gradients across the stenosis of peripheral pulmonary artery dropped significantly from 33.0 +/- 16.0 mmHg to 10.2 +/- 4.4 mmHg (P < 0.01). One year later, repeated cardiac catheterization was performed on both patients. In the patient with tetralogy of Fallot, a 20 mmHg pressure gradient was found between the main and left pulmonary artery. This patient then received another stent implantation to release the residual stenosis. The boy with D-transposition of great vessels had only 9 mmHg gradient between main and right pulmonary artery. Transcatheter placement of the stent is a feasible and effective method to treat certain patients with significant pulmonary arterial stenosis if surgical correction can not be performed.