Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and mitral valve replacement . Status post sternotomy . The cardiac silhouette continues to be enlarged . There is mild CHF . No pleural effusion or pneumothorax is noted .
    OUTPUT:
    
Cardiomegaly with mild CHF . No focal pneumonic infiltrate identified . No gross effusion .