Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: STATUS POST STERNOTOMY . CARDIOMEDIASTINAL SILHOUETTE IS PROBABLY UNCHANGED ALLOWING FOR DIFFERENCES IN TECHNIQUE . SMALL LEFT AND QUESTION SMALL RIGHT EFFUSION , WITH PATCHY OPACITIES AT BOTH BASES , SIMILAR TO THE PRIOR FILM . UPPER ZONE REDISTRIBUTION AND MILD VASCULAR BLURRING , WHICH MAY BE VERY SLIGHTLY MORE PRONOUNCED . NO EVIDENCE OF PNEUMOTHORAX OR AIR IN THE MEDIASTINUM .
    OUTPUT:
    
POSSIBLE SLIGHT WORSENING OF CHF FINDINGS . OTHERWISE , SIMILAR TO 1 DAY PRIOR , INCLUDING SMALL LEFT - GREATER - THAN - RIGHT EFFUSION . NO EVIDENCE OF MEDIASTINAL AIR .