Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP semi upright and lateral views of the chest provided . Midline sternotomy wires are noted . Lung volumes are low limiting assessment . There is bibasilar atelectasis . No convincing signs of pneumonia or edema . No large effusion or pneumothorax . The heart is mildly enlarged . The mediastinal contour is normal . No acute bony abnormalities .
    OUTPUT:
    
Mild cardiomegaly with bibasilar atelectasis .