Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate a newly placed left chest wall pacemaker generator with a right atrial and ventricular leads appropriately positioned . No pneumothorax is seen . Compared to the prior radiograph , there is unchanged left pleural effusion and right basilar atelectasis . The cardiac and mediastinal contours are normal . No acute pneumonia is appreciated .
    OUTPUT:
    
Satisfactory position of left chest wall pacemaker with appropriately positioned right atrial and ventricular leads . No pneumothorax .