Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Lung volumes are markedly low which limits assessment primarily through the lower lungs . Overlying EKG leads are present . There is persistent cardiomegaly with hilar congestion . Difficult to exclude mild pulmonary interstitial edema . No large effusion or pneumothorax is seen . Mediastinal contour is stable . Imaged bony structures are grossly intact .
    OUTPUT:
    
Persistent pulmonary vascular congestion with possible mild pulmonary interstitial edema . Stable cardiomegaly .