Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy , CABG , and mitral valve replacement . Heart size is mildly enlarged . Mediastinal and hilar contours are unremarkable . There is mild pulmonary vascular congestion . The lungs are hyperinflated with slightly flattened diaphragms suggestive of COPD . No focal consolidation , pleural effusion or pneumothorax is identified . There is diffuse demineralization of the osseous structures with mild loss of height of a low thoracic vertebral body .
    OUTPUT:
    
Mild pulmonary vascular congestion . COPD .