Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild cardiomegaly . The hilar and mediastinal contours are normal . There has been interval placement of a left - sided pacemaker with the leads in the right atrium and right ventricle in appropriate position . There is no pneumothorax or pleural effusion . No focal consolidations concerning for infection are identified .
    OUTPUT:
    
No evidence of a pneumothorax status post left pacemaker placement with leads in the appropriate position .