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[Indications of valvular pulmonary stenosis on plain chest films (author's transl)]
Insights
Radiographic findings like poststenotic dilatation are key for diagnosing valvular pulmonary stenosis in children. These signs become more apparent with age, aiding in early detection.
Area of Science:
- Pediatric Cardiology
- Diagnostic Imaging
- Thoracic Radiology
Background:
- Valvular pulmonary stenosis is a congenital heart defect requiring accurate diagnosis.
- Plain chest films are a common imaging modality in pediatric diagnostics.
- Identifying specific radiographic markers is crucial for non-invasive assessment.
Purpose of the Study:
- To evaluate the diagnostic utility of plain chest films for valvular pulmonary stenosis in children.
- To identify essential radiographic findings indicative of valvular pulmonary stenosis.
- To assess the influence of age on the detectability of radiographic signs.
Main Methods:
- Retrospective analysis of plain chest films from 87 children with diagnosed valvular pulmonary stenosis and 92 healthy controls (aged 4-14 years).
- Evaluation focused on poststenotic dilatation of the pulmonary trunk and left pulmonary artery, hilar enlargement, and pulmonary vascularity.
- Cardiac size was assessed using heart volume calculations.
Main Results:
- Poststenotic dilatation of the pulmonary trunk and left pulmonary artery, with normal or increased left-sided perihilar vascularity, are essential diagnostic indicators.
- Pulmonary trunk dilatation was observed in 58/87 patients; hilar enlargement in 50/87.
- Radiographic signs of valvular pulmonary stenosis were more evident in older children; no correlation with stenosis severity was found.
Conclusions:
- Plain chest radiography can effectively aid in diagnosing valvular pulmonary stenosis in children, particularly in older age groups.
- Key findings include poststenotic dilatation and hilar enlargement, which become more pronounced with age.
- Cardiac size remained within normal limits, and radiographic findings did not correlate with stenosis severity.
Abstract:
Plain chest films of 87 children aged 4-14 years with valvular pulmonary stenosis proved by cardiac catheterization and of an age matched control group of 92 healthy children were evaluated in a retrospective study. Up to 4 years the evaluation was impaired by the overlying thymus. The evidence of poststenotic dilatation of the pulmonary trunk and the left pulmonary artery branch together with a normal or increased left sided perihilar pulmonary vascularity is essential for the diagnosis of valvular pulmonary stenosis. The pulmonary trunk showed marked dilatation in 47 cases, mild dilatation in 11 cases and no dilatation in 21 cases. A cranial displacement of the pulmonary trunk which partially reached or overlapped the aortic knuckle was seen in 44 children. 50 children showed a hilar enlargement due to the poststenotic dilatation of the left pulmonary artery branch. 1/5 of the children showed extension of the poststenotic enlargement into the left sided segmental artery branches. Cardiac size, calculated by heart volume, was within age specific limits. No correlation was found concerning the severity of the stenosis and the radiographic findings. Indications of valvular pulmonary stenosis increased with the age of the child.