Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post sternotomy . The heart is enlarged . The mediastinal and hilar contours appear unchanged allowing for differences in technique including mild rightward shift of mediastinal structures in association with persistent moderate relative elevation of the left hemidiaphragm . Right lateral pleural thickening is stable . There is no evidence for pleural effusion on the right . A mild diffuse interstitial abnormality suggests fluid overload or pulmonary vascular congestion . Blunting of posterior costophrenic sulci may reflect tiny effusions , but the lateral view is limited due to soft tissue attenuation .
    OUTPUT:
    
Mild interstitial abnormality suggesting pulmonary vascular congestion or fluid overload . Similar moderate relative elevation of the left hemidiaphragm and cardiomegaly .