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Unusual combination of congenital heart defects in an infant with Noonan syndrome
1Division of Pediatric Cardiology, Rhode Island Hospital, Providence, RI 02903, USA.
Insights
Noonan syndrome frequently causes congenital heart defects. This case highlights a rare combination of heart abnormalities, including partial atrioventricular septal defect and polyvalvular dysplasia, leading to rapid decline in an infant.
Area of Science:
- Cardiology
- Genetics
- Pediatrics
Background:
- Noonan syndrome is a genetic disorder associated with a high prevalence of congenital heart defects (CHDs), affecting 35-50% of patients.
- Common cardiac manifestations include pulmonary stenosis and hypertrophic cardiomyopathy, but rare combinations of defects are possible.
Observation:
- This report details an infant diagnosed with Noonan syndrome presenting with a unique constellation of congenital heart defects.
- The observed defects included a partial atrioventricular septal defect, polyvalvular dysplasia, and progressive hypertrophic cardiomyopathy.
Findings:
- The infant exhibited an unusual and previously unreported combination of congenital heart lesions.
- The specific interplay between the partial atrioventricular septal defect, polyvalvular dysplasia, and hypertrophic cardiomyopathy is discussed.
Implications:
- This case underscores the diverse spectrum of cardiac pathology in Noonan syndrome.
- Understanding complex CHD interactions is crucial for predicting outcomes and managing affected infants.
- Further research into genotype-phenotype correlations may elucidate the mechanisms behind these rare presentations.
Abstract:
Congenital heart disease occurs in 35-50% of patients diagnosed with Noonan syndrome. We present an infant with an unusual combination of congenital heart defects not previously reported, including partial atrioventricular septal defect, polyvalvular dysplasia, and progressive hypertrophic cardiomyopathy. We discuss the possible interaction between these lesions that may have led to the patient's rapid demise.