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Gradient over Melody valve in left AV valve position reduces with beta blockade
T Krasemann1, P van de Woestijne2, G van den Berg1
1Department of Pediatrics, Division of Pediatric Cardiology, Sophia Kinderziekenhuis, Erasmus MC, Rotterdam, The Netherlands.
Cardiology in the Young
|July 24, 2019
Summary
The Melody valve gradient in infants is affected by heart rate. Beta blockers can reduce both heart rate and the Melody valve gradient in the atrioventricular position.
Area of Science:
- Cardiology
- Biomedical Engineering
- Pediatric Heart Surgery
Background:
- The Melody valve is primarily used in the pulmonary outflow tract.
- It can also be utilized for atrioventricular (AV) valve pathologies.
- Increasing pressure gradients across the valve typically indicate a need for re-dilation.
Observation:
- A case study involving an infant with a Melody valve in the left AV position was analyzed.
- The pressure gradient across the implanted valve was observed.
- A correlation between the patient's heart rate and the observed gradient was noted.
Findings:
- The study found that the gradient across the Melody valve in the AV position is dependent on heart rate in infants.
- Administration of beta blockers effectively lowered both the heart rate and the pressure gradient.
- This suggests a potential non-surgical management strategy for Melody valve dysfunction in this context.
Implications:
- This finding highlights the importance of considering heart rate when assessing Melody valve function in pediatric patients.
- Beta blockers may offer a therapeutic option to manage elevated gradients related to heart rate.
- Further research is warranted to explore the long-term efficacy and safety of this approach.
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