Right atrial enlargement is seen on clinical imaging of the heart. Enlargement of the right atrium can be associated with conditions such as tricuspid insufficiency, pulmonary atresia, and hypoplastic left heart syndrome. In these cases, the right atrium appears enlarged on frontal and left anterior oblique x-ray projections, accompanied by decreased pulmonary vascularity in pulmonary atresia and severe pulmonary venous congestion in hypoplastic left heart syndrome.

1. 1Right Atrial Enlargement

2. CLINICAL IMAGAGING
AN ATLAS OF DIFFERENTIAL DAIGNOSIS
EISENBERG
DR. Muhammad Bin Zulfiqar
PGR-FCPS III SIMS/SHL

3. • Fig CA 1-1 Tricuspid insufficiency. (A) Frontal
and (B) left anterior oblique projections show
striking right atrial enlargement.1

4. • Fig CA 1-2 Pulmonary atresia. Marked right
atrial enlargement associated with decreased
pulmonary vascularity.

5. • Fig CA 1-3 Hypoplastic left heart syndrome.
Globular cardiomegaly with severe pulmonary
venous congestion.