Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . As before , there is a left - sided pacemaker with an associated right ventricular lead . The patient is status post midline sternotomy and CABG . There is minimal right basilar atelectasis . The lungs are otherwise clear . Mild cardiomegaly is unchanged . The mediastinal contours are normal . There are no pleural effusions . No pneumothorax is seen .
    OUTPUT:
    
1 . No acute intrathoracic process . 2 . Unchanged mild cardiomegaly .