Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An upright portable radiograph of the chest was obtained . The base of the right hemithorax is obscured by an overlying pacemaker . The dual leads extend to the expected positions of the right atrium and ventricle . The patient is status post bilateral shoulder arthroplasties . A left base / retrocardiac opacity may represent consolidation . There may also be a small left pleural effusion . Additionally , there is a superimposed central pulmonary vascular engorgement . The cardiomediastinal contour is enlarged , as on prior exam . There is no pneumothorax .
    OUTPUT:
    
1 . Left base / retrocardiac opacity , which may represent consolidation as well as a small left pleural effusion . 2 . Central pulmonary vascular engorgement