Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is interval placement of a left pacemaker with leads terminating in the right atrium and right ventricle . There is no pleural effusion or pneumothorax . Cardiomediastinal and hilar contours are stable . There is no focal consolidation concerning for pneumonia . Pulmonary vasculature is within normal limits .
    OUTPUT:
    
Successful placement of a left pacemaker with leads terminating in the right atrium and right ventricle . No pneumothorax .