Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright view of the chest demonstrates right PIC catheter tip projecting over mid SVC . Swan - Ganz catheter is positioned at the pulmonary outflow tract . The heart remains markedly enlarged . Perihilar vascular congestion . Costophrenic angles are minimally blunted , suggestive of possible trace pleural effusions . No pneumothorax .
    OUTPUT:
    
In comparison to ___ exam , there is no significant change in severe cardiomegaly and possible trace bilateral pleural effusions .