Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to the prior examination , there has been no significant interval change . Redemonstrated is a left pectoral pacemaker with leads seen intact and terminating in their expected positions . The patient is also status post CABG with median sternotomy wires seen well aligned . There is no evidence of pneumothorax , focal consolidation , pleural effusion , or pulmonary edema . Stable , mild to moderate cardiomegaly is noted . Mediastinal contours are normal . No bony abnormality is detected .
    OUTPUT:
    
Left pectoral pacemaker with intact leads terminating in their expected positions . No evidence of pneumothorax .