Abstract
Background
Interventional therapies for severe pulmonary arterial hypertension (PAH) can provide right ventricular (RV) decompression and preserve cardiac output. Transcatheter stent placement in a residual ductus arteriosus (PDA) is one potentially effective option in critically ill infants and young children with PAH. We sought to assess recovery of RV function by echocardiographic strain in infants and young children following PDA stenting for acute PAH.
Methods
Retrospective review of patients < 2 years old who underwent PDA stenting for acute PAH. Clinical data were abstracted from the electronic medical record. RV strain (both total and free wall components) was assessed from echocardiographic images at baseline and 3, 6, and 12 months post-intervention, as well as at last echocardiogram.
Results
Nine patients underwent attempted ductal stenting for PAH. The median age at intervention was 38 days and median weight 3.7 kg. One-third (3of 9) of patients had PAH associated with a congenital diaphragmatic hernia. PDA stents were successfully deployed in eight patients. Mean RV total strain was − 14.9 ± 5.6% at baseline and improved to − 23.8 ± 2.2% at 6 months post-procedure (p < 0.001). Mean free wall RV strain was − 19.5 ± 5.4% at baseline and improved to − 27.7 ± 4.1% at 6 months (p = 0.002). Five patients survived to discharge, and four patients survived 1 year post-discharge.
Conclusion
PDA stenting for severe, acute PAH can improve RV function as assessed by strain echocardiography. The quantitative improvement is more prominent in the first 6 months post-procedure and stabilizes thereafter.
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Acknowledgements
As mentioned in the discussion of this manuscript, 4 of these patients were included in Pulmonary-to-Systemic Arterial Shunt to Treat Children With Severe Pulmonary Hypertension by Grady et al. [21]; a report from the International Potts Registry.
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by JSK, SC, AMF, and KG. The first draft of the manuscript was written by JSK and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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This study was approved by the Boston Children’s Hospital IRB and a waiver of consent was obtained per the retrospective nature of the study (IRB-P00042655).
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Kerstein, J.S., Valencia, E., Collins, S. et al. Transcatheter Ductus Arteriosus Stenting for Acute Pediatric Pulmonary Arterial Hypertension is Associated with Improved Right Ventricular Echocardiography Strain. Pediatr Cardiol (2023). https://doi.org/10.1007/s00246-023-03233-7
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DOI: https://doi.org/10.1007/s00246-023-03233-7