Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and cardiac valve replacement . The lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . Cardiac silhouette is mild to moderately enlarged . No pulmonary edema is seen . Mediastinal contours are unremarkable .
    OUTPUT:
    
Cardiomegaly . No pulmonary edema .