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[Radiological patterns of truncus arteriosus on X-ray plain film (author's transl)]
Insights
Radiographic findings in truncus arteriosus vary by age. Early diagnosis in infants requires identifying specific chest X-ray patterns, especially with pulmonary hypervasculature, to aid in identifying this congenital heart defect.
Area of Science:
- Pediatric Cardiology
- Diagnostic Imaging
- Congenital Heart Disease
Background:
- Truncus arteriosus is a complex congenital heart defect with variable radiographic presentations.
- Accurate diagnosis relies on interpreting subtle radiographic findings, particularly in infants.
Purpose of the Study:
- To describe the characteristic radiographic features of truncus arteriosus on chest X-rays in infants and children.
- To correlate imaging findings with patient age and associated physiological changes like pulmonary hypervasculature.
Main Methods:
- Retrospective analysis of frontal and lateral chest X-ray plain films from 15 pediatric cases of truncus arteriosus.
- Evaluation of specific radiographic features including aortic arch position, retrosternal space, and pulmonary vasculature.
Main Results:
- Infants: Concave or straight left middle segment, often with pulmonary hypervasculature; diagnosis challenging without it.
- Children (2-6 years): Cardiomegaly, right aortic arch, and pulmonary hypervasculature are typical.
- Children (>6 years): Typical Eisenmenger syndrome with marked empty retrosternal space.
- Right aortic arch and pulmonary hypervasculature association is highly characteristic.
Conclusions:
- Chest X-ray findings for truncus arteriosus evolve with age.
- Specific patterns on plain films, especially the association of right aortic arch with pulmonary hypervasculature, are key diagnostic indicators.
- Radiographic assessment is crucial for early diagnosis and management planning.
Abstract:
Fifteen cases of truncus arteriosus have been studied on frontal and lateral views of thoracic X-ray plain film in infants and children. In infants (12 radiological records), the left middle segment is concave or straight, mainly at the lower part and this pattern is typical if associated with an active pulmonary hypervasculature. Cases without marked pulmonary hypervasculature are very difficult to diagnose. On 7 lateral X-ray films we noted three patterns of empty retrosternal space which were visible at birth. In children from 2 to 6 years, a pattern of cardiomegaly with right aortic arch and pulmonary hypervasculature is very typical. In children older than 6 years, we noted a typical Eisenmenger syndrome. The pattern of empty retrosternal space was marked. In our experience, association of right aortic arch with pulmonary hypervasculature is very typical.