Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided dual - chamber pacemaker device is is demonstrated with leads terminate in the right atrium and right ventricle . Moderate enlargement of the cardiac silhouette is similar compared to the previous exam . The mediastinal and hilar contours are unchanged . Previously noted vascular congestion has essentially resolved with no pulmonary edema noted . Patchy and linear opacities in the lung bases bilaterally likely reflect areas of atelectasis , without focal consolidation . No pleural effusion or pneumothorax is present . Moderate multilevel degenerative changes are seen within the thoracic spine .
    OUTPUT:
    
Moderate cardiomegaly without evidence for pulmonary edema . Patchy bibasilar atelectasis .