Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Right chest wall single lead pacer is again noted with single lead extending into the region of the right ventricle . Midline sternotomy wires and prosthetic cardiac valve are again seen . The heart remains moderately enlarged . The mediastinal contour is normal . There is no focal consolidation concerning for pneumonia . No large effusion or pneumothorax seen . No signs of congestion or edema . Imaged bony structures are intact . No free air below the right hemidiaphragm seen .
    OUTPUT:
    
Moderate cardiomegaly unchanged . No convincing signs of edema or pneumonia .