Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided dual - chamber pacemaker device is noted with leads terminating in the right atrium and right ventricle . Mild enlargement of the cardiac silhouette is unchanged . The mediastinal and hilar contours are within normal limits . There is mild elevation of the left hemidiaphragm , similar compared to the previous study , with mild adjacent left basilar opacity likely reflective of atelectasis . Remainder of the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is present . Pulmonary vasculature is normal . No acute osseous abnormality is seen
    OUTPUT:
    
No acute cardiopulmonary abnormality .