Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest demonstrates intact median sternotomy wires . Cardiac silhouette is mildly enlarged . Thoracic aorta is tortuous , containing arch calcifications . Since preceding exam , there is increased vascular engorgement without frank edema . New or worsened left basal consolidation is either progressing pneumonia or atelectasis and there may be a new , small left pleural effusion .
    OUTPUT:
    
1 . Vascular congestion could be due to volume overload ( particularly if the patient is receiving volume support ) . 2 . New left base pneumonia or atelectasis .