Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph obtained . Midline sternotomy wires and mediastinal clips are again noted . There is a dual - lead pacer with unchanged position with lead tips extending to the right atrium and right ventricle region . A coronary stent is also noted projecting over the left heart border . There is mild interstitial pulmonary edema without frank pulmonary alveolar edema . Retrocardiac space is suboptimally assessed given underpenetrated status . No large right effusion . No clear signs of pneumothorax .
    OUTPUT:
    
Mild interstitial edema with cardiomegaly .