Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . AICD is unchanged with leads extending to the region of the right atrium and right ventricle . Midline sternotomy wires and mediastinal clips are again noted . Heart remains mildly enlarged . There are low lung volumes with crowding of bronchovascular markings and atelectasis in the lower lungs . No overt evidence for pneumonia or CHF . No large effusion or pneumothorax . Mediastinal contour stable . Bony structures appear intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Crowding of bronchovascular markings in the lower lungs with atelectasis , without convincing signs of pneumonia or edema . Stable mild cardiomegaly .