Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . The dual - chamber transvenous pacemaker leads are in the appropriate position in the right atrium and right ventricle . No pneumothorax , mediastinal widening or evidence of hemothorax . No pleural effusion . Mild cardiomegaly stable . Left mild basilar atelectasis . No evidence of pneumonia .
    OUTPUT:
    
Dual - chamber transvenous pacemaker leads are in appropriate positions . No evidence of pneumothorax , mediastinal widening , or evidence of hemothorax .