Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is possible hyperinflation , which could reflect COPD . The patient is at status post sternotomy , with multiple mediastinal clips . There is moderate to moderately severe cardiomegaly , which appears stable compared with the chest x-ray dated ___ . There is upper zone redistribution , without other evidence of CHF . No focal infiltrate or effusion is detected . Possible minimal pleural thickening at the base of the left lateral ribcage , unchanged . Degenerative changes noted in the thoracic spine .
    OUTPUT:
    
1 . Stable cardiomegaly , with sternotomy wires present . 2 . Upper zone redistribution , without other evidence of CHF , unchanged . 3 . No focal infiltrate or effusion . No free air seen beneath the diaphragm .