Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pacemaker is again seen with leads ending in the expected locations of the right atrium and ventricle , unchanged . The patient is status post CABG . Cardiomegaly is stable . The lungs are clear with no evidence of pneumonia . There is no pleural effusion or pneumothorax . Mediastinal contours are within normal limits .
    OUTPUT:
    
No evidence of pneumonia . Stable cardiomegaly .