Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right IJ Swan - Ganz catheter tip projects over the mediastinal contours and is appropriately positioned in the right pulmonary artery . No mediastinal widening . Interval improvement and moderate cardiomegaly and interval decrease in pulmonary vascular congestion . Lung volumes are slightly low . Unchanged position of the left - sided cardiac pacemaker - defibrillator device and 3 leads . No pneumothorax , pleural effusion , pulmonary edema , pneumothorax , or focal consolidation .
    OUTPUT:
    
1 . Appropriate position of the right IJ Swan - Ganz catheter . 2 . Interval decrease in cardiomegaly and pulmonary vascularity .