Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left pectoral dual - chamber pacer terminates in the region of the right atrium and ventricle . The heart size is top normal . There is no pneumothorax , pleural effusion , or focal consolidation . Atherosclerotic calcifications are noted in the aortic knob .
    OUTPUT:
    
Stable placement of dual - chamber pacer . No evidence of complication .