Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is stable . Transvenous pacer leads are in standard position with tip in the right atrium and right ventricle . There is no pneumothorax or pleural effusion . Bibasilar atelectasis are grossly unchanged . Sternal wires are aligned . Patient is status post CABG .
    OUTPUT:
    
No pneumothorax . Pacer leads in standard position