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Balloon aortic valvoplasty in paediatric patients: progressive aortic regurgitation is common
C Balmer1, M Beghetti, M Fasnacht
1Paediatric Cardiology Units of the Children's University Hospital, Zurich, Switzerland. christian.balmer@kispi.unizh.ch
Insights
Balloon aortic valvoplasty is safe for congenital aortic stenosis but infants need early reintervention. Progressive aortic regurgitation is a long-term issue, unaffected by balloon size.
Area of Science:
- Pediatric Cardiology
- Interventional Cardiology
- Congenital Heart Disease
Background:
- Congenital aortic stenosis is a serious condition in children.
- Balloon aortic valvoplasty is a treatment option, but its effectiveness and risks, especially regarding aortic regurgitation, require evaluation.
Purpose of the Study:
- To assess the immediate and midterm outcomes of balloon aortic valvoplasty in pediatric patients with congenital aortic stenosis.
- To specifically evaluate the incidence and progression of aortic regurgitation post-procedure.
Main Methods:
- A retrospective study was conducted on 70 pediatric patients (0-16.4 years) across two tertiary referral centers.
- Patients underwent balloon aortic valvoplasty using a mean balloon-to-annulus ratio of 0.90.
- Outcomes measured included Doppler gradients and the degree of aortic regurgitation, with a median follow-up of 19.8 months.
Main Results:
- Balloon aortic valvoplasty significantly reduced pressure gradients, with a mild increase at follow-up.
- Freedom from moderate to severe aortic regurgitation was initially lower in infants (<3 months) but became comparable to older children by two years.
- Infants (<3 months) had a significantly higher rate of reintervention compared to older children (35% vs. 80% by three years).
Conclusions:
- Balloon aortic valvoplasty is a safe and effective treatment for pediatric congenital aortic stenosis.
- Infants with critical aortic stenosis face a high rate of early reintervention.
- Progressive aortic regurgitation is a significant long-term complication, and smaller balloon sizes do not appear to prevent it.
Objective:
To evaluate immediate and midterm results after balloon valvoplasty in a paediatric population with congenital aortic stenosis, giving special consideration to aortic regurgitation.
Design:
Retrospective study.
Setting:
Two tertiary referral centres for paediatric cardiology.
Patients:
70 consecutive patients, with an age range of 0-16.4 years. Group A infants < 3 months old (n = 21). Group B children > 3 months old (n = 49). Median follow up time was 19.8 months, range 0-158 months.
Intervention:
All patients underwent balloon aortic valvoplasty. The balloon to annulus ratio was selected at a mean of 0.90 (range 0.67-1.0).
Main Outcome Measures:
Doppler gradients and degree of aortic regurgitation.
Results:
The pressure gradient dropped significantly with the intervention and increased mildly at follow up. Freedom from relevant aortic regurgitation (that is, moderate and severe) was initially lower in group A (75% v 90% after one month) but after two years the difference between the two groups was not significant (50% v 61%). Freedom from reintervention was significantly lower in group A (with 35% v 80%) after three years.
Conclusion:
Aortic balloon valvoplasty is safe and effective but has a high rate of early reintervention in infants with critical aortic stenosis. The major long term problem is progressive aortic regurgitation, which does not seem to be prevented by the use of small balloons.
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