Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . This accentuates the size of the cardiac silhouette which appears mildly enlarged . A large hiatal hernia is re - demonstrated . Mediastinal and hilar contours are otherwise unchanged . There is crowding of the bronchovascular structures . No overt pulmonary edema is demonstrated , though there is likely mild pulmonary vascular engorgement . Left - sided dual - chamber pacemaker device is noted with leads terminating in the right atrium and right ventricle , unchanged . Streaky opacities in the lung bases likely reflect atelectasis . No pleural effusion or pneumothorax is clearly demonstrated . Degenerative changes of the left glenohumeral joint are present .
    OUTPUT:
    
Low lung volumes with possible mild pulmonary vascular congestion and bibasilar atelectasis . Large hiatal hernia .