Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Sternotomy wires are demonstrated and unchanged . A left - sided pacer and dual leads are stable . The heart is top - normal in size . Lung volumes are low and there is crowding of the bronchovascular structures . There is mild pulmonary edema , minimally increased from the prior examination . There is an increasing confluent opacity at the base of the right lung which could represent atelectasis or focal consolidation . A trace left pleural effusion is demonstrated . There is fluid seen along the horizontal fissure on the right . No large pneumothorax is identified .
    OUTPUT:
    
Mildly increasing edema . Confluent opacity at the base of the right lung likely represents a combination of atelectasis , fluid within the horizontal fissure and edema however concurrent infection should be considered . No pneumothorax .