Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left chest wall single lead pacing device is again seen . Degree of cardiomegaly is moderate to severe , unchanged . Median sternotomy wires and mediastinal clips are again seen . The lungs are clear without consolidation , effusion , or edema . Linear opacity seen posteriorly on the lateral view is likely scarring versus atelectasis . No acute osseous abnormalities . Stent partially visualized in the abdominal aorta .
    OUTPUT:
    
Cardiomegaly without superimposed acute cardiopulmonary process .