Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Left pacemaker and leads are in standard positioning , unchanged . Patient is status post median sternotomy with wires intact and properly aligned . Lungs are well inflated and grossly clear . No pleural effusion or pneumothorax . Hilar contours are normal . Severe cardiomegaly is unchanged .
    OUTPUT:
    
1 . No pneumothorax . Left pacemaker and leads are in standard positioning , unchanged . 2 . Severe cardiomegaly is unchanged .