Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette is severely enlarged . Areas of atelectasis at the right lung base are stable . No focal consolidation or pulmonary edema . The thoracic aorta is tortuous . There is no pleural effusion or pneumothorax . A left chest single lead AICD is unchanged in position . Patient is status post median sternotomy with aortic valve replacement .
    OUTPUT:
    
No pulmonary edema or consolidation . Right lower lobe atelectasis . Severe cardiomegaly .