Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is enlarged heart with pulmonary vascular redistribution and bilateral lower lobe alveolar infiltrates . It is unclear if the lower lobe infiltrates are infectious or due to pulmonary edema . There is a tiny right effusion . There is a small left effusion .
    OUTPUT:
    
Unclear if infiltrates are due to infection or pulmonary edema .