Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and aortic valve replacement . Heart is moderately enlarged . There is no pulmonary edema . No consolidation or pleural effusion . The lungs are hyperinflated . There is a questionable hiatal hernia .
    OUTPUT:
    
1 . Moderate cardiomegaly . 2 . No acute intrathoracic process .