Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and aortic and mitral valve replacement . Mild to moderate cardiomegaly is unchanged . The mediastinal and hilar contours are normal . The pulmonary vascularity is not engorged . The lungs are clear . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary process .