Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Tripolar pacer again seen unchanged in position . Heart is mildly enlarged . The lungs are clear without focal consolidation , effusion or pneumothorax . Mild congestion difficult to exclude without convincing signs of edema . Mediastinal contour is normal . Bony structures are intact .
    OUTPUT:
    
Stable cardiomegaly with possible mild congestion .