Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable AP view of the chest . The heart is severely enlarged . Compared to prior study , there is decrease in pulmonary vascular congestion and there is mild pulmonary edema . No focal infiltrate . No pneumothorax or pleural effusion . Low lung volumes .
    OUTPUT:
    
Improvement in pulmonary edema , now mild interstitial edema . Severe cardiomegaly .