Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Aside from mild atelectasis at the right base the right lung is clear . There is worsening opacification of the left retrocardiac region with air bronchograms suggesting atelectasis . Moderate cardiomegaly is unchanged . New pacer lead has been placed via the coronary vein and projects over the left ventricle . Leads terminating in the right atrium and right ventricle are unchanged . There is no evidence of large pleural effusion or pneumothorax .
    OUTPUT:
    
Coursing left basilar atelectasis . No evidence of large pleural effusion or pneumothorax .