Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy , CABG , and aortic valve replacement . Severe cardiomegaly is unchanged . There is mild pulmonary vascular congestion , not substantially changed in the interval without overt pulmonary edema . Mediastinal and hilar contours are otherwise unchanged . No focal consolidation , pleural effusion or pneumothorax is present . No acute osseous abnormalities detected .
    OUTPUT:
    
Severe cardiomegaly with chronic mild pulmonary vascular congestion .