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Percutaneous balloon valvuloplasty for pulmonary valve stenosis in infants and children
Insights
Balloon pulmonary valvotomy effectively relieved pulmonary valve stenosis in infants and children, offering significant pressure reductions. This interventional procedure shows promise for long-term relief and may reduce the need for surgery.
Area of Science:
- Cardiology
- Pediatric Cardiology
- Interventional Cardiology
Background:
- Pulmonary valve stenosis is a critical congenital heart defect.
- Effective treatment is crucial for improving patient outcomes.
- Balloon valvotomy is a primary interventional approach.
Purpose of the Study:
- To evaluate the efficacy of balloon dilatation for pulmonary valve stenosis in pediatric patients.
- To assess immediate and long-term hemodynamic outcomes.
- To determine the role of echocardiography in guiding balloon selection.
Main Methods:
- Retrospective analysis of 27 balloon dilatation procedures in 23 pediatric patients.
- Echocardiography used for pulmonary valve diameter estimation and balloon sizing.
- Cardiac catheterization performed before and after dilatation to measure pressures.
Main Results:
- Significant reductions in right ventricular systolic pressure and pulmonary systolic pressure gradients were observed immediately post-dilatation.
- Recatheterization in 12 patients showed further hemodynamic improvement, especially in those with initially suboptimal results.
- Four patients with poor initial outcomes underwent successful repeat balloon dilatation.
Conclusions:
- Balloon pulmonary valvotomy provides effective short- and medium-term relief for pulmonary valve stenosis in children.
- The procedure may obviate the need for surgical intervention in many cases.
- A suboptimal immediate result does not preclude a favorable long-term outcome.
Abstract:
Pulmonary valve stenosis was relieved by balloon dilatation during cardiac catheterisation on 27 occasions in 23 infants and children aged 7 days to 12 years, median 31 months (three aged less than 2 weeks). Pulmonary valve diameter was estimated by cross sectional echocardiography to assist in the choice of balloon size. Before dilatation the right ventricular systolic pressure ranged from 41 to 190 (median 92) mm Hg and was suprasystemic in 10 patients. There were significant reductions in the ratio of right ventricular to systemic systolic pressure and pulmonary systolic pressure gradients immediately after balloon dilatation. Twelve patients underwent recatheterisation (11 at six months and one at one week after balloon dilatation), which showed further improvement with significant reductions in right ventricular pressure or pulmonary valve gradient or both, particularly in the patients with the least satisfactory initial results. This improvement was attributed to resolution of the obstruction at infundibular level. Repeat pulmonary valve dilatation was successfully performed in four patients who had poor results after initial dilatation. Balloon pulmonary valvotomy appears to provide good short term and medium term relief of pulmonary valve stenosis and may obviate the need for surgery in many cases. An apparently poor immediate haemodynamic result does not preclude a good longer term result.