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The plain chest radiograph in infants with an isolated ventricular septal defect
Insights
Radiographic patterns in infants with ventricular septal defects (VSD) were identified. These chest X-ray findings correlate with shunt size and pulmonary vascular resistance in VSD patients.
Area of Science:
- Pediatric Cardiology
- Diagnostic Imaging
- Thoracic Radiology
Background:
- Ventricular septal defect (VSD) is a common congenital heart anomaly.
- Accurate assessment of VSD severity and its impact on pulmonary circulation is crucial for management.
- Chest radiography is a widely accessible imaging modality in pediatric care.
Purpose of the Study:
- To describe and categorize the plain chest radiographic features in infants with isolated ventricular septal defects (VSD).
- To correlate these radiographic patterns with hemodynamic parameters such as right ventricular pressure, shunt size, and pulmonary vascular resistance.
- To compare radiographic findings in VSD infants with those of age-matched normal infants.
Main Methods:
- Retrospective analysis of chest radiographs from 43 infants diagnosed with isolated VSD.
- Confirmation of VSD and assessment of hemodynamic parameters via cardiac catheterization.
- Comparison of VSD infant radiographs with a control group of normal infants.
Main Results:
- Four distinct radiographic patterns were observed in infants with VSD.
- Pattern 1: Normal radiographic appearance.
- Patterns 2-4 showed varying degrees of pulmonary artery and proximal lung vessel dilatation, with Pattern 4 exhibiting uneven blood distribution.
Conclusions:
- Plain chest radiography can reveal characteristic patterns in infants with VSD.
- These patterns appear to correlate with the severity of the shunt and pulmonary vascular resistance.
- Radiographic findings may offer valuable insights into the hemodynamic consequences of VSD in infants.
Abstract:
The plain chest radiographic features of 43 infants with a ventricular septal defect are described. All were under 1 year of age, and cardiac catheter studies confirmed that they had an isolated ventricular septal defect (VSD), so that the RV pressure, size of the shunt and the pulmonary vascular resistance could be related to the radiographic appearances. The radiographs of a number of normal infants of similar age were available for comparison. Four patterns were seen in those with a VSD. In group 1 the radiograph appeared normal. In group 2 there was dilatation of the pulmonary artery and the proximal lung vessels, while in group 3 only the proximal lung vessels were dilated. In group 4 only some of the hilar and proximal lung vessles were dilated, so that the blood distribution appeared uneven.