Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is stable compared to the prior exam . The aorta is mildly tortuous , and mild widening of the mediastinum is likely post-operative . There appears to be interval increase in a small left - sided pleural effusion with adjacent atelectasis . There has been interval improvement in the mild pulmonary edema . The median sternotomy wires appear to be intact without evidence of fracture .
    OUTPUT:
    
Slight interval increase in small left pleural effusion with adjacent opacity likely secondary to atelectasis .