Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Sternotomy wires are intact . Dual - chamber pacemaker with lead tips in right ventricle and right atrium . Right Swan - Ganz catheter with tip at outflow tract . ET tube is 4 cm above the carina and in correct position . End of NG tube extends into proximal stomach . Left chest tube is unchanged . Low lung volumes bilaterally with mild increase in left lower lobe atelectasis . No additional focal opacity , pulmonary edema , pleural effusion , or pneumothorax . Heart is mildly enlarged with normal mediastinal contour and hila . No bony abnormality .
    OUTPUT:
    
1 . Mild interval increase in left lower lobe atelectasis . 2 . No pneumothorax . 3 . Swan - Ganz catheter with tip at outflow tract .