Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of a right internal jugular central venous catheter , terminating in the proximal to mid SVC without evidence of pneumothorax . The patient is status post median sternotomy . Dual lead right - sided pacemaker is again seen , unchanged in position . Curvilinear radiopaque structures project over the bilateral proximal humeri , not seen on the prior study and most likely external to the patient . Otherwise , there has been no significant interval change .
    OUTPUT:
    
Interval placement of right internal jugular central venous catheter terminating in the proximal to mid SVC without evidence of pneumothorax .