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Am J Perinatol 2024; 41(S 01): e1709-e1716
DOI: 10.1055/a-2067-7925
Review Article

“Heart of the Matter”: Cardiac Dysfunction in Congenital Diaphragmatic Hernia

Sharada H. Gowda 
1   Department of Pediatrics, Baylor College of Medicine, Houston, Texas
,
Neil Patel
2   Department of Neonatology, Royal Hospital for Children, Glasgow, United Kingdom
› Author Affiliations
Funding None.
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Abstract

Despite advances in caring for neonates with congenital diaphragmatic hernia (CDH), mortality and morbidity continues to be high. Additionally, the pathophysiology of cardiac dysfunction in this condition is poorly understood. Postnatal cardiac dysfunction in neonates with CDH may be multifactorial with origins in fetal life. Mechanical obstruction, competition from herniated abdominal organs into thoracic cavity combined with redirection of ductus venosus flow away from patent foramen ovale leading to smaller left-sided structures may be a contributing factor. This shunting decreases left atrial and left ventricular blood volume, which may result in altered micro- and macrovascular aberrations affecting cardiac development in the prenatal period. Direct mass effect from herniated intra-abdominal contents restricting cardiac growth and/or reduced left ventricular preload may contribute independently to left ventricular dysfunction in the absence of right ventricular dysfunction and or pulmonary hypertension. With variable clinical phenotypes of cardiac dysfunction, pulmonary hypertension, and respiratory failure in patients with CDH, there is increased need for individualized diagnosis and tailored therapy. Routine use of therapy such as inhaled nitric oxide and sildenafil that induces significant pulmonary vasodilation may be detrimental in left ventricle dysfunction, whereas in a patient with pure right ventricle dysfunction, they may be beneficial. Targeted functional echocardiography serves as a real-time tool for defining the pathophysiology and aids optimization of vasoactive therapy in affected neonates.

Key Points

  • Cardiac dysfunction in neonates with CDH is multifactorial.

  • Postnatal cardiac dysfunction in patients with CDH has its origins in fetal life.

  • Right ventricular dysfunction contributes to systemic hypotension.

  • Left ventricular dysfunction contributes to systemic hypotension.

  • Supportive therapy should be tailored to clinical phenotype.

Keywords

ventricular dysfunction - congenital diaphragmatic hernia - cardiac phenotype - cardiac function in CDH


Publication History

Received: 23 March 2023

Accepted: 29 March 2023

Accepted Manuscript online:
03 April 2023

Article published online:
26 April 2023

© 2023. Thieme. All rights reserved.

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