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The fetal heart in diaphragmatic hernia
L D Allan1, M S Irish, P L Glick
1Division of Pediatric Cardiology, Babies Hospital 2N, Columbia Presbyterian Medical Center, New York, USA. la48@columbia.edu
Insights
Fetal cardiac evaluation is crucial for diaphragmatic hernia, as heart displacement alters blood flow and chamber growth. Assessing cardiovascular profiles aids understanding and identifies fetuses for potential intrauterine therapy.
Area of Science:
- Perinatology
- Fetal Cardiology
- Congenital Abnormalities
Background:
- Congenital diaphragmatic hernia (CDH) significantly impacts fetal cardiac development.
- Abdominal contents in the chest displace the heart, altering hemodynamics.
- Secondary effects include diminished chamber growth, especially the left heart, and associated structural malformations.
Purpose of the Study:
- To highlight the importance of cardiac evaluation in fetuses diagnosed with diaphragmatic hernia.
- To explore how altered cardiovascular flow profiles deepen the understanding of CDH pathophysiology.
- To identify fetuses with CDH that may benefit from intrauterine therapeutic interventions.
Main Methods:
- Detailed fetal echocardiography.
- Assessment of cardiac structure and function.
- Analysis of cardiovascular flow profiles (e.g., Doppler studies).
Main Results:
- Diaphragmatic hernia frequently leads to cardiac displacement and altered intracardiac flow dynamics.
- Secondary cardiac chamber growth abnormalities, particularly left heart hypoplasia, are common.
- Structural heart malformations are frequently associated findings in fetuses with CDH.
Conclusions:
- Comprehensive fetal cardiac evaluation is essential for managing diaphragmatic hernia.
- Cardiovascular flow profile analysis offers insights into CDH pathophysiology.
- Predicting fetuses amenable to intrauterine therapy can be improved through detailed cardiac assessment.
Abstract:
Cardiac evaluation is an important part of the investigation of a fetus with a diaphragmatic hernia. The heart is displaced by the physical presence of the abdominal contents in the chest, and the flow dynamics within the heart are altered. This can produce secondary diminution of chamber growth, particularly of the left heart. Structural heart malformation is also a frequently associated finding. Evaluation of cardiovascular flow profiles may give us further understanding of the pathophysiology of this lesion and may help to predict those fetuses that might benefit from intrauterine therapy.