Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided dual - chamber pacemaker device is noted with leads in unchanged positions in the right atrium and right ventricle . Transcatheter aortic valve remains in unchanged position . Heart size is mildly enlarged . Mediastinal and hilar contours are similar with atherosclerotic calcifications noted at the aortic knob . There is mild interstitial pulmonary edema , not substantially changed in the interval . There is likely a trace left pleural effusion which appears similar , and the previously noted right pleural effusion is likely decreased in size . No pneumothorax is present . Mild atelectasis is noted in the lung bases , more pronounced on the left . No acute osseous abnormality is detected .
    OUTPUT:
    
Mild interstitial pulmonary edema and trace left pleural effusion , similar to prior exam . Previously noted trace right pleural effusion may be improved . Continued bibasilar atelectasis .