Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires and prosthetic cardiac valve are again noted . The heart remains moderately enlarged . Mild interstitial edema is present . There may be a tiny right pleural effusion . No signs of pneumonia . No pneumothorax . Mediastinal contour normal . Bony structures are intact .
    OUTPUT:
    
Stable cardiomegaly with mild interstitial edema . Tiny right pleural effusion .