Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided pacemaker projects leads into the right atrium and ventricle . Multiple intact sternal wires denote prior history of median sternotomy . The heart size is top normal . The hilar and mediastinal contours are within normal limits . The lungs were slightly underinflated , however there is no pneumothorax , focal consolidation , or pleural effusion . A large gastric air bubble is seen , with mild elevation of the left hemidiaphragm . No free air is present . There is mild leftward deviation of the upper trachea , which appears new .
    OUTPUT:
    
1 . No acute intrathoracic process . 2 . No free intraabdominal air . 3 . Mild leftward deviation of the trachea . Please correlate with physical examination .