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A genetic study of children with congenital heart defect
Insights
Congenital heart defects in children can indicate genetic issues. A scoring system helps identify those needing chromosomal studies, with familial cases crucial for genetic counseling.
Area of Science:
- Medical Genetics
- Pediatric Cardiology
- Clinical Dysmorphology
Background:
- Congenital heart defects (CHDs) are common birth anomalies with diverse etiologies.
- Identifying underlying genetic causes is critical for diagnosis, prognosis, and family counseling.
- Family history and associated malformations are key indicators for genetic evaluation.
Purpose of the Study:
- To evaluate the utility of family history, pregnancy data, and malformation incidence in identifying genetic causes of CHD.
- To develop a scoring system for selecting pediatric CHD patients for chromosomal studies.
- To determine the recurrence risk of CHDs in first-degree relatives.
Main Methods:
- Retrospective analysis of 213 children diagnosed with congenital heart defects.
- Collection of family history, pregnancy data, and presence of minor/major malformations.
- Development and application of a scoring system for chromosomal study selection.
Main Results:
- Minor anomalies were not significantly more frequent than in healthy newborns.
- Children with a score of 2 or more had a higher incidence of chromosomal aberrations (2/213) and Noonan syndrome (1/213).
- Major non-cardiac malformations were present in 8% of the cohort.
- The incidence of CHDs among first-degree relatives was 4.1%.
Conclusions:
- A scoring system can aid in selecting pediatric CHD patients for genetic investigation.
- The presence of specific malformations and a positive family history warrant further genetic evaluation.
- Early detection of familial CHD cases is vital for effective genetic counseling.
Abstract:
Family history, anamnestic data concerning pregnancy and the incidence of minor and major malformations were examined in 213 children affected by congenital heart defect; a scoring system was elaborated for selecting patients for chromosomal study. The incidence of minor anomalies was not higher than among unselected healthy newborns; among children scoring 2 or more points there were two patients with chromosomal aberration and one with Noonan's syndrome. In 8% of 213 children major concomitant non-cardiac malformations were present. The incidence of congenital heart malformations among first-degree relatives amounted to 4.1%. Detection of familial cases is of utmost importance in genetic counselling.