Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . There is a moderate hiatal hernia which is unchanged . There are mediastinal clips and evidence of aortic valve replacement . Mild cardiomegaly is unchanged . No focal consolidation , pleural effusion or pneumothorax . The mediastinal and hilar contours are normal .
    OUTPUT:
    
No acute cardiopulmonary process . Unchanged moderate hiatal hernia .