Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were obtained . Dual - lead pacer is unchanged . The heart size is top normal in size . There is no definite sign of pneumonia or CHF . No pleural effusion or pneumothorax . Bony structures are intact . Cardiomediastinal silhouette is stable . Atherosclerotic calcification along the aortic knob noted .
    OUTPUT:
    
Top normal heart size . Otherwise normal .