Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient status post median sternotomy with wires intact . A cardiac conduction device is contiguous with leads which appear to terminate in the right atrium and right ventricle . The ventricular lead has a horizontal orientation . Right lower lobe atelectasis is unchanged . The cardiomediastinal silhouette is unremarkable , not widened . No pleural effusion . No evidence of pneumothorax .
    OUTPUT:
    
No evidence pneumothorax . Interval placement of a cardiac conduction device .