Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a left - sided dual lead pacemaker with leads overlying the expected locations of the right atrium and ventricle . The heart size is normal . There are calcifications of the aortic knob . The lungs are mildly hyperinflated . No pneumothorax , focal consolidation , or pleural effusion is noted . There is slight wedging of a mid thoracic vertebral body as before .
    OUTPUT:
    
No pneumothorax . Status post placement of left - sided dual lead pacemaker .