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Prenatal screening for structural congenital heart disease
Lindsey E Hunter1, John M Simpson1
1Fetal Cardiology Unit, Department of Congenital Heart Disease, Evelina London Children's Hospital, London SE1 7EH, UK.
Insights
Prenatal diagnosis of congenital heart defects via echocardiography aids in early intervention and improves outcomes. Early detection, even in low-risk pregnancies, is crucial for managing these conditions and reducing infant mortality.
Area of Science:
- Fetal Medicine
- Pediatric Cardiology
- Medical Imaging
Background:
- Congenital heart defects (CHDs) are a significant concern in fetal development.
- Prenatal diagnosis of CHDs allows for comprehensive evaluation and parental counseling.
- Early detection can facilitate timely interventions for severe cardiac lesions.
Purpose of the Study:
- To highlight the benefits of prenatal diagnosis of congenital heart defects.
- To emphasize the role of echocardiography in identifying fetal cardiac abnormalities.
- To discuss the impact of prenatal diagnosis on postnatal outcomes and healthcare costs.
Main Methods:
- Utilizing fetal echocardiography for the diagnosis of congenital heart defects.
- Investigating coexisting abnormalities in affected fetuses.
- Analyzing the impact of prenatal diagnosis on morbidity, mortality, and healthcare expenses.
Main Results:
- Prenatal diagnosis enables thorough fetal assessment and informed parental decision-making.
- For specific conditions like hypoplastic left heart syndrome, prenatal diagnosis reduces complications.
- Prenatal diagnosis can decrease healthcare costs associated with emergency infant transport.
Conclusions:
- Prenatal diagnosis of congenital heart defects is vital for improving fetal and infant outcomes.
- Screening programs should focus on recognizing cardiac abnormalities during mid-trimester scans, especially in low-risk populations.
- Structured training for sonographers is essential to enhance the detection rates of fetal heart conditions.
Abstract:
Congenital heart defects can be diagnosed during fetal life using echocardiography. Prenatal diagnosis allows full investigation of affected fetuses for coexisting abnormalities, and gives time for parents to be informed about the prognosis of the fetus and treatments that might be required. In a minority of cases, where the natural history suggests an unfavourable outcome, prenatal diagnosis provides an opportunity for fetal cardiac intervention. For some cardiac lesions, notably hypoplastic left heart syndrome, transposition of the great arteries, and coarctation of the aorta, prenatal diagnosis has been shown to reduce postnatal morbidity and mortality. Some costs of care, notably the transport of critically ill infants, are reduced by prenatal diagnosis. Prenatal screening programmes typically recommend detailed assessment of fetuses judged to be at high risk of congenital heart disease. However, most cases of congenital heart disease arise in the low-risk population, and detection of affected fetuses in this setting depends on recognizing abnormalities of the heart during the midtrimester scan. Evidence supports the use of structured training interventions and feedback to those undertaking sonographic examinations, to improve the prenatal detection of congenital heart disease.
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