Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy , CABG , and mitral valve replacement . Cardiac silhouette size is borderline enlarged . Mediastinal and hilar contours are within normal limits . There is mild upper zone vascular redistribution , as seen previously without overt pulmonary edema . Lung volumes remain low . No focal consolidation , pleural effusion or pneumothorax is present . No acute osseous abnormality is detected .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Chronic mild pulmonary vascular congestion .