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Interventional pediatric cardiology: state of the art and future perspective
1S.C. Children's Heart Center, Medical University of South Carolina, Charleston 29425-0680.
Insights
Interventional catheter therapy offers effective treatments for congenital heart disease, often replacing surgery. Balloon dilatation and stent placement are key techniques for conditions like pulmonary stenosis and coarctation.
Area of Science:
- Cardiology
- Interventional Cardiology
- Pediatric Cardiology
Background:
- Interventional catheter therapy has significantly advanced cardiac catheterization and congenital heart disease treatment.
- In some centers, interventional procedures constitute 30% or more of all cardiac catheterizations.
- For certain cardiac lesions, surgical intervention is becoming obsolete due to catheter-based alternatives.
Purpose of the Study:
- To review the current applications and outcomes of interventional catheter therapy in congenital heart disease.
- To highlight the efficacy of balloon dilatation and stent placement for various cardiovascular conditions.
- To discuss emerging catheter-based interventions and their impact on patient care.
Main Methods:
- Review of interventional catheterization techniques for congenital heart disease.
- Analysis of outcomes for balloon dilatation in valvular and non-valvular stenoses.
- Evaluation of stent placement, device closure, and other catheter-based procedures.
Main Results:
- Balloon dilatation effectively treats valvular pulmonary stenosis and coarctation, often eliminating pressure gradients.
- Balloon dilatation for valvular aortic stenosis results in mild residual stenosis.
- Stent placement improves success rates for pulmonary artery stenosis to 75%-80%.
- Transvenous closure of patent ductus arteriosus and atrial septal defects are feasible.
- Other interventions include therapeutic vascular occlusions and radiofrequency ablation.
Conclusions:
- Interventional catheter therapy is a primary treatment modality for many congenital heart defects, often replacing surgery.
- Balloon dilatation and stent implantation offer durable and effective solutions for stenotic lesions.
- Catheter-based closure devices are expanding treatment options for septal defects and patent ductus arteriosus.
Abstract:
Interventional catheter therapy has drastically changed the practice of cardiac catheterization and the treatment of congenital heart disease. In some centers, interventions amount to 30% or more of all cardiac catheterizations. For some lesions, surgery has become obsolete. For valvular pulmonary stenosis, balloon dilatation is the therapy of choice and results in permanent elimination of pressure gradients. Balloon dilatation is also indicated for valvular aortic stenosis and results in mild residual stenosis with gradients below 35 mmHg. Aortic insufficiency, mostly mild, is induced in 15%-20%. Native and post-operative coarctation can be successfully dilated. About 50% of pulmonary artery stenoses can be relieved by balloon dilatation. Stent placement increases the success rate to 75%-80%. Stent implantation is also being investigated for other lesions. Valvular pulmonary atresia can be opened by catheter technique. In the majority of patients over 6 kg, the patent ductus arteriosus is transvenously closed by implantation of the Rashkind occluder. Secundum or similar atrial septal defects and muscular ventricular septal defects can also be closed by catheter technique, but suitable specific occluders are not generally available at present. Therapeutic vascular occlusions, radiofrequency ablation of aberrant conduction pathways and arrhythmia foci are examples of other catheter interventions.