Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The Swan - Ganz catheter is in expected position . Median sternotomy wires are unchanged . The cardiomediastinal and hilar contours are stable from the prior examination . The aorta is minimally calcified . There is a new small left pleural effusion and adjacent compressive atelectasis . Minimal right basal atelectasis . There is mild pulmonary vascular engorgement . No pneumothorax .
    OUTPUT:
    
Small left effusion and compressive atelectasis at the left base . Minimal right basal atelectasis . Mild pulmonary vascular engoregement .