Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Median sternotomy sutures appear intact . A left chest wall pacer / defibrillator is stable in positioning and with contiguous leads . Surgical clips related to prior coronary artery bypass evident . There is stable moderate - to - severe cardiomegaly . Bibasilar streaky opacifications , similar in appearance to prior examinations and likely due to atelectasis in the setting of low lung volumes . No overt pulmonary edema evident . No pleural effusion is present .
    OUTPUT:
    
Stable moderate - to - severe cardiomegaly . Bibasilar opacifications are similar to prior and likely due to atelectasis . No overt pulmonary edema . No opacification concerning for pneumonia .