Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Permanent pacemaker remains in place via a left subclavian approach , with leads overlying the right atrium and right ventricle . There is no visible pneumothorax . Low lung volumes accentuate the cardiac silhouette and bronchovascular structures .
    OUTPUT:
    
No evidence of pneumothorax following pacemaker placement .