Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are bilateral low lung volumes with prominent pulmonary vasculature and interstitial markings most likely representing worsening pulmonary edema ; however , atypical pneumonia can not be excluded but is much less likely . No areas of focal consolidation concerning for infection . There is a small right pleural effusion . No pneumothorax is identified . Pleural surfaces are unremarkable . The heart is stably enlarged with the proximal electrode of a left - sided pacer device extending from the SVC into the low right atrium , unchanged in longstanding position . The lead terminates at the apex of the right ventricle . Median sternotomy wires are again noted in alignment and with no evidence of failure .
    OUTPUT:
    
Low lung volumes with increased vascular prominence suggestive of worsening pulmonary edema . Though much less likely , an atypical pneumonia can not be excluded ,