Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate to severe cardiomegaly , including but not limited to left atrial enlargement , is unchanged compared to the prior exam . Sternotomy wires again noted . The aorta is unfolded , unchanged . The mediastinal and hilar contours are grossly unchanged . There is trace upper zone redistribution , but no other evidence of CHF . No focal consolidations concerning for pneumonia are identified . There is no pleural effusion or pneumothorax . The visualized osseous structures show degenerative changes , but are otherwise grossly unremarkable .
    OUTPUT:
    
Stable moderate - to - severe cardiomegaly . Trace upper zone redistribution . Otherwise , no acute pulmonary process identified .