Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Pacing wires are unchanged in position projecting over the region of the right atrium and right ventricle . The enlarged cardiomediastinal silhouette is unchanged . There is a tortuous thoracic aorta . Mild interstitial abnormality is improved from prior . Minimal bibasilar opacities unchanged , most likely representing subsegmental atelectasis . Enlargement of the right hilum , was seen previously , and could be indicative of pulmonary hypertension . The lungs are hyperinflated . There is no pneumothorax or large pleural effusion .
    OUTPUT:
    
Unchanged cardiomegaly and thoracic aortic tortuosity . Improved interstitial abnormality when compared to prior radiographs .