Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are obtained . Enlargement of the cardiac silhouette persists . The mediastinum and hilar contours are stable . No focal consolidation , pleural effusion , or evidence of pneumothorax is seen . No overt pulmonary edema is seen . Degenerative changes are seen along the spine .
    OUTPUT:
    
No significant interval change . Persistent enlargement of the cardiac silhouette .