Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Intra-aortic balloon pump is approximately 4 .3 cm from the roof of the aortic arch and is probably too low . Remainder of the support devices are unchanged , with the Swan - ___ catheter tip persisting to be in a right lower lobe pulmonary artery . Again seen is retrocardiac opacity with possible small left pleural effusion . There is otherwise no change in parenchymal findings . Cardiomediastinal silhouette is stable .
    OUTPUT:
    
1 . Intra-aortic balloon pump 4 .3 cm from the roof of the aortic arch and is likely too low . 2 . Swan - Ganz persists in the right lower lobe pulmonary artery