Figure 1.

Chest X-ray (CXR) signs of pulmonary hypertension: enlarged central pulmonary arteries, with the prominence of the main pulmonary artery (MPA) (black arrow); the left pulmonary artery seen within the cardiac silhouette (dotted line); tapering of peripheral pulmonary arteries (so-called pruning); prominence of the right heart border, represented by the right atrium (black arrowhead); and filling of the retrosternal space in the lateral view due to right ventricle dilation (white arrow).