Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There has been interval placement of a single - lead left - sided pacemaker with lead extending to the expected position of the right ventricle without evidence of pneumothorax . Linear left base opacities likely represent atelectasis / scarring . The lungs are hyperinflated with flattening of the diaphragms , suggesting chronic obstructive pulmonary disease . The cardiac silhouette is top normal to mildly enlarged . The aorta remains calcified and tortuous . No focal consolidation , pleural effusion is seen . There is no overt pulmonary edema . Median sternotomy wires are again seen along with mediastinal surgical clips . Sclerosis of a lower thoracic vertebral body remains unchanged .
    OUTPUT:
    
Status post placement of a single - lead left - sided pacemaker with lead extending to the expected position of the right ventricle without evidence of pneumothorax . Left basilar atelectasis / scarring .