Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . A left chest wall pacer is seen with leads extending into the coronaries sinus and right ventricle . Midline sternotomy wires and mediastinal clips are noted . The heart remains mildly enlarged . Mild hilar congestion is suggested without frank edema . No effusion or pneumothorax . No signs of pneumonia . The mediastinal contour is stable . Bony structures appear intact . Degenerative changes of the bilateral AC joints is noted .
    OUTPUT:
    
Cardiomegaly with possible mild congestion .