Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . No prior . Left base opacity suggestive of small pleural effusion . Right lateral costophrenic angle is not included . Indistinct pulmonary vascular markings are seen bilaterally . Cardiac silhouette is enlarged . There is no visualized radiopaque prosthetic valve . Single - lead pacing device seen with lead tip projecting over the region of the right ventricle . Atherosclerotic calcifications noted at the aortic arch . Median sternotomy wires and mediastinal clips are seen . Osseous and soft tissue structures are grossly unremarkable .
    OUTPUT:
    
Small left pleural effusion and findings compatible with mild pulmonary edema . Cardiomegaly without visualized radiopaque prosthetic valve .