Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest are provided . The patient is status post median sternotomy and cardiac valve replacement . There is no focal consolidation , pleural effusion , or pneumothorax . There is no evidence of CHF . Heart size is mildly enlarged , but stable . There are degenerative changes along the spine . There are aortic calcifications .
    OUTPUT:
    
No acute cardiopulmonary process .