Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A dual lead left - sided pacemaker device appears intact with 1 tip ending in the right atrium and the other in the right ventricle . Lung volumes are slightly low , perhaps secondary to lack of full inspiration . The lungs are clear . No pneumothorax , pleural effusion , or focal consolidation . The heart is normal in size . No pulmonary edema . The descending thoracic aorta is slightly tortuous or ectatic . The mediastinum is not widened . Hila are within normal limits .
    OUTPUT:
    
No pneumothorax . Appropriate position of pacemaker leads .