Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Marked cardiomegaly is unchanged since ___ . Right atrial and left ventricular pacer leads and a right ventricular defibrillator leads are in unchanged position . Bilateral hilar enlargement is also stable . No pneumothorax . Blunting of the costophrenic angles is seen only on the lateral view and likely represents trace pleural effusions .
    OUTPUT:
    
Moderate cardiomegaly is stable . Trace pleural effusions .