Abstract
Background
The ductus arteriosus (DA) is critical in maintaining postnatal circulation in neonates with obstructed systemic circulation (OSC) and pulmonary circulation (OPC). We hypothesized that the size of the DA and aortic isthmus (AoI) undergoes adaptive growth in utero to counteract the hemodynamic challenges in these congenital heart diseases (CHD).
Methods
Postnatal echocardiograms of neonates diagnosed prenatally with ductal-dependent CHD who were started on prostaglandins within 24 h of birth were reviewed. We assessed the cross-sectional area of the aortic valve opening, pulmonary valve opening, AoI, and DA by calculating (diameter)2/body surface area. Neonates were classified into OSC or OPC then subgrouped depending upon the patency of semilunar valves: OSC with and without aortic atresia (OSC-AA and OSC-nAA, respectively) and OPC with and without pulmonary atresia (OPC-PA and OPC-nPA, respectively).
Results
Ninety-four cases were studied. The DA in OSC was significantly larger than OPC, and the DA in OSC-AA was significantly larger than OSC-nAA. The size of the AoI was significantly larger in OPC than OSC and larger in OSC-AA than OSC-nAA. Within the OSC-nAA group, there was no significant difference in the size of the DA, AoI, or pulmonary valve opening between those with retrograde flow (RF) at the AoI and without (nRF) except the aortic valve opening was significantly larger in nRF. All groups had comparable cross-sectional areas of systemic output.
Conclusions
Our findings suggest that DA and AoI show compensatory growth to maintain critical blood flow to vital organs against primary anatomical abnormalities in ductus-dependent CHD. (249 words)
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Abbreviations
- AA:
-
Aortic atresia
- AoI:
-
Aortic isthmus
- AS:
-
Aortic stenosis
- AVO:
-
Aortic valve opening
- BSA:
-
Body surface area
- CoA:
-
Coarctation of aorta
- CCAVC:
-
Complete common atrioventricular canal
- CHD:
-
Congenital heart disease
- DA:
-
Ductus arteriosus
- DAo:
-
Descending aorta
- DORV:
-
Double outlet right ventricle
- HLHS:
-
Hypoplastic left heart syndrome
- IVS:
-
Intact ventricular septum
- LV:
-
left ventricle/ventricular
- MA:
-
Mitral Atresia
- MS:
-
Mitral stenosis
- n:
-
Without
- OPC:
-
Obstructed pulmonary circulation
- OSC:
-
Obstructed systemic circulation
- PA:
-
Pulmonary atresia
- PDA:
-
Patent ductus arteriosus
- PGE1:
-
Prostaglandin E1
- PS:
-
Pulmonary stenosis
- PVO:
-
Pulmonary valve opening
- RF:
-
Retrograde flow
- TOF:
-
tetralogy of Fallot
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We thank Ms. Kimberley Eissmann for her editing of the manuscript text.
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TT conceptualized the study design. DV created an initial database of the study cohort. All authors participated in data collection. LH, AMB, and TT analyzed the collected data, and LH and TT summarized the data and created the Tables and Figures. LH wrote an original draft, which was repeatedly edited by TT and AMB. All authors reviewed and approved the final version of the manuscript.
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Hashim, L., Vari, D., Bhat, A.M. et al. Adaptive Growth of the Ductus Arteriosus and Aortic Isthmus in Various Ductus-Dependent Complex Congenital Heart Diseases. Pediatr Cardiol (2023). https://doi.org/10.1007/s00246-023-03236-4
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DOI: https://doi.org/10.1007/s00246-023-03236-4