Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low compared to the prior study resulting crowding of the pulmonary bronchovascular structures . Bilateral lower lobe airspace opacities with prominence of the hila is most consistent with congestive heart failure . There is left lower lobe atelectasis versus consolidation . Probable left pleural effusion . A dual lead pacemaker is in - situ , unchanged in position when compared to the prior study and obscuring the left mid lung . He reverse right shoulder arthroplasty is noted .
    OUTPUT:
    
Bilateral lower lobe airspace opacities likely reflecting pulmonary edema . Left lower lobe atelectasis , superimposed infection can not be excluded . Probable small left pleural effusion .