Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previous external pacemaker has been removed , and a new left pacemaker has been placed with leads ending at the right atrium and right ventricle respectively . The cardiac silhouette is normal , and no congestion , pneumothorax or signs of mediastinal hemorrhage are seen . No consolidation , pleural effusion or pulmonary edema is seen .
    OUTPUT:
    
Successful left cardiac pacemaker placement with leads at the right atrium and right ventricle respectively . No pneumothorax or other complications .