Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs were obtained . A left chest dual - chamber pacemaker has leads terminating in the right atrium and right ventricle . There is a small left apical pneumothorax without evidence of tension . The lungs are fully expanded and clear . The heart is mildly enlarged . Hilar contours and pleural surfaces are normal . There is tortuosity of the descending aorta . There is no pleural effusion .
    OUTPUT:
    
1 . Left chest pacemaker with leads in right atrium and right ventricle . 2 . Small left apical pneumothorax without evidence of tension . Dr .___ was paged at 11 : 30 am for notification .