Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is re-demonstration of a left - sided pacemaker with associated right atrial and right ventricular leads . A linear opacity at the left lung base is not significantly changed , likely scarring . There is minimal bibasilar lower lung atelectasis . Upper lung predominant emphysema was better seen on prior chest CT from ___ . There are no pleural effusions . No pneumothorax is seen . The heart size is top normal .
    OUTPUT:
    
1 . No focal consolidation or evidence of congestive heart failure . 2 . Minimal bibasilar atelectasis . 3 . Emphysema .