Differentiating an ASD from a VSD using a chest X-ray – Paediatrics MCQ

Differentiating an ASD from a VSD using a chest X-ray is by detection of?
A. Enlargement of pulmonary artery
B. Enlarged left atrium
C. Dilated aorta
D. Pulmonary plethora

Correct answer : B. Enlarged left atrium

asd-cxrChest X-ray of a patient with atrial septal defect showing an enlarged right pulmonary artery (RPA), main pulmonary artery (MPA) and right atrium (RA). End-on view of an enlarged pulmonary vessel is also seen.

Differentiating an ASD from a VSD using a chest X-ray

  • Left atrium is not dilated in a case of atrial septal defect (ASD).
  • It is dilated in patients with ventricular septal defect. (VSD).
  • Pulmonary plethora is present in both ASD and VSD.
  • Pulmonary artery is dilated in both.
  • Size of the aorta is normal in both.

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