Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild pulmonary edema has recurred . Lung bases are obscured by a combinaton of chronic moderate to severe cardiomegaly There is no pneumothorax . Pneumonia and pleural effusions could be present .
    OUTPUT:
    
Recurrent heart failure . Basal pneumonia and pleural effusions , even moderate in volume are open questions due to limitations of conventional radiography with a patient of this size .