Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: All the monitoring and support devices are in constant and standard position including the tracheostomy tube and right internal jugular vein catheter that ends in lower SVC . Constant position also of the left pectoral pacemaker and its wires that following the standard course . There are no major interval changes since prior chest x-ray except for improved lung ventilation at the bases , especially on the left . Persists right lower lobe atelectasis and minimal improvement of the mild vascular congestion , Heart size is mildly enlarged . No pneumothorax .
    OUTPUT:
    
Improved ventilation of the left lung bases with minimal improvement of the vascular congestion . Unchanged right base atelectasis .