Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided pacer / ICD is seen with its leads terminating in the right atrium and right ventricle , unchanged locations . The heart is enlarged . The hilar and mediastinal contours are within normal limits . Lung volumes are low . There is no focal consolidation , pleural effusion or pneumothorax . There is no overt pulmonary edema . Mild bibasilar scarring is noted , as seen on prior chest CT . There are mild degenerative changes of the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary process .