Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low which causes crowding of the bronchovascular structures . Pulmonary vascular congestion has improved since ___ . There is no large pleural effusion or pneumothorax . The cardiac and mediastinal contours are stable . There is a cardiac pacer , mediastinal clips and sternotomy wires .
    OUTPUT:
    
Pulmonary vascular congestion has improved since ___ . Cardiomegaly .