Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior exam , there has been increase in mild to moderate interstitial edema with trace fissural fluid . No pleural effusion is detected . Heart size is persistently enlarged . No focal pulmonary consolidation or pneumothorax is detected . Pacing hardware appears similarly positioned .
    OUTPUT:
    
Slightly increased pulmonary edema .