Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left chest wall dual - lead pacemaker remains with leads terminating in the right atrium and right ventricle in unchanged position . Dense opacification of the left lung base with obscuration of the left hemidiaphragm and the left cardiac contour is likely a combination of pleural fluid and atelectasis , although underlying consolidation can not be excluded . There is no large right pleural effusion . There is no pneumothorax . Increased interstitial markings are consistent with pulmonary edema . Heavy calcification of the aortic knob is again noted . A vascular stent is noted projecting over the right axilla .
    OUTPUT:
    
Severe pulmonary edema with dense opacity at the left lung base , similar to prior , likely representing a combination of pleural effusion and atelectasis . Underlying consolidation is not excluded .