Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided dual - chamber pacemaker device is noted with leads terminating in right atrium and right ventricle . Mild cardiac enlargement is unchanged . The aorta remains tortuous and diffusely calcified . There is mild pulmonary vascular congestion with perihilar haziness , new compared to the prior exam . Patchy bibasilar airspace opacities likely reflect atelectasis , however , infection is not completely excluded . No large pleural effusion is identified although a trace left pleural effusion may be present . No pneumothorax is seen .
    OUTPUT:
    
1 . Mild pulmonary vascular congestion , new from the prior exam . 2 . Streaky bibasilar airspace opacities likely reflect atelectasis though infection can not be excluded . Possible trace left pleural effusion .