Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided dual - chamber pacemaker device is noted with leads terminating in the right atrium and right ventricle , unchanged . Moderate - to - severe cardiomegaly is unchanged , aorta remains unfolded . Mediastinal and hilar contours are otherwise stable . There is no pulmonary edema . Subsegmental atelectasis or scarring is seen within the left lung base . No new focal consolidation , pleural effusion or pneumothorax is present . Multilevel degenerative changes within the thoracic spine are again demonstrated .
    OUTPUT:
    
No evidence for pneumonia or pulmonary edema .