Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate to severe cardiomegaly is a stable . Pacer lead tip is in standard position in the right ventricle . There is mild vascular congestion . Bibasilar atelectasis . . There is no pneumothorax or pleural effusion . There are mild degenerative changes in the thoracic spine
    OUTPUT:
    
No pneumothorax . Mild vascular congestion