Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Pacemaker overlying left chest with leads that appear intact in the right atrium and right ventricle . Sternotomy wires appear intact and appropriately aligned . Small right pleural effusion , which was likely present on the prior chest radiograph . Mild interstitial pulmonary edema has improved . Stable moderate enlargement of the cardiac silhouette . No pneumothorax is seen .
    OUTPUT:
    
1 . Pacemaker leads in appropriate positioning . 2 . Improving mild interstitial pulmonary edema . 3 . Small right pleural effusion .