Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is a stable . Swan - Ganz catheter tip is in the left main pulmonary artery . ET tube is in standard position . Enteric tube is out of view below the diaphragm . Moderate pulmonary edema is unchanged . Improved aeration of the lower lobes . There is no pneumothorax . Pacer leads are in standard position . Sternal wires are aligned .
    OUTPUT:
    
Swan - Ganz catheter tip in the left main pulmonary artery . Improved aeration of the lower lobes Stable pulmonary edema