Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph is obtained . Midline sternotomy wires and mediastinal clips again noted . The heart is mildly enlarged . There is mild pulmonary edema which appears similar to prior exam . There is a small left pleural effusion and possibly tiny right pleural effusion . No pneumothorax is seen . Overall , heart and mediastinal contour appears normal . Bony structures are intact .
    OUTPUT:
    
Cardiomegaly with pulmonary edema and small bilateral pleural effusions .