Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval placement of a dual lead pacer , with 1 lead terminating in the right atrium , and a second coursing posteriorly , likely via the coronary sinus , although oblique positioning on the lateral view somewhat limits assessment . Small bilateral pleural effusions and adjacent bibasilar atelectasis are similar on the left and slightly improved on the right . No visible pneumothorax .
    OUTPUT:
    
Dual lead pacemaker placement with 1 lead in the right atrium and the ___ coursing posteriorly , likely via the coronary sinus . No pneumothorax .