system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Which of the following features on X-ray chest can differential an Atrial septal Defect (ASD) from a Ventricular Septal Defect (VSD)?
assistant
The correct answer is  Left atrial enlargement is not seen in an ASD. In ASD cardiomegaly is due to enlargement of the right atrium and right ventricle. In VSD cardiac silhouette is of left ventricular type. Ref: Essential pediatrics by O.P.Ghai 6th edn/page 401, 403.