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Balloon aortic valvuloplasty in children
1Department of Pediatrics, University of Wisconsin Medical School, Madison.
Insights
Balloon aortic valvuloplasty offers encouraging immediate and intermediate results for aortic stenosis, with minimal complications. Further research is needed to confirm long-term effectiveness and refine techniques for pediatric patients.
Area of Science:
- Cardiology
- Interventional Cardiology
- Pediatric Cardiology
Background:
- Balloon aortic valvuloplasty (BAV) has been utilized since 1983 for aortic stenosis.
- It is applied in infants, children, and adults.
- BAV shows promising immediate and intermediate-term outcomes.
Purpose of the Study:
- To review the effectiveness and safety of balloon aortic valvuloplasty.
- To compare BAV outcomes with surgical valvotomy.
- To identify indications and potential complications of BAV.
Main Methods:
- Review of existing literature on balloon aortic valvuloplasty.
- Analysis of immediate and intermediate-term results.
- Evaluation of complication rates and follow-up data.
Main Results:
- BAV demonstrates encouraging results with minimal complications, comparable to surgical valvotomy.
- Key indications include gradients >80 mmHg or >50 mmHg with symptoms/ECG changes.
- Restenosis is a concern, necessitating risk factor management; Echo-Doppler is vital for follow-up.
Conclusions:
- BAV is a viable option for aortic stenosis, with potential for subaortic stenosis treatment.
- Long-term (5-10 year) follow-up data is crucial for assessing durability.
- Technique refinement and system miniaturization are needed to enhance safety and efficacy, especially in pediatric cases.
Abstract:
The technique of balloon aortic valvuloplasty has been used in infants, children, and adults since its first description in 1983. Immediate results reported by several workers and intermediate-term results by a few workers appear encouraging. Complications are minimal although potential for arterial complications and aortic insufficiency should be recognized. Significant restenosis rates at intermediate-term follow-up have been reported and could be minimized by reducing the risk factors associated with recurrence. Echo-Doppler studies are useful in follow-up evaluation of balloon valvuloplasty. The results seem to compare favorably with those following surgical valvotomy. The indications are essentially the same as those used for surgery; a gradient in excess of 80 mmHg irrespective of symptoms or a gradient greater than or equal to 50 mmHg with symptoms or ST-T wave changes. Previous surgical valvotomy is not a contraindication for balloon valvuloplasty. The technique is applicable to subaortic membranous stenosis as well. Thus far only one- to two-year follow-up results are available. Five- to ten-year follow-up results to document long-term effectiveness of balloon aortic valvuloplasty are needed. Miniaturization of currently bulky dilating catheter systems and improving rapidity of inflation/deflation of balloons are necessary to increase safety and effectiveness of these techniques in infants and children. Meticulous attention to the details of the technique and further refinement of the procedure may further increase effectiveness and reduce the complication rate.