Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Post placement of a left chest wall pacemaker with leads terminating in the right ventricle and right atrium . Mediastinal contours and hila are stable . No pleural effusion or pneumothorax . Right upper lobe linear opacity adjacent to a fiducial marker is consistent with post radiation change . Moderate cardiomegaly , saccular descending thoracic aortic aneurysm , and thoracic levoscoliosis are stable .
    OUTPUT:
    
Post pacemaker placement without evidence of complication .