Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pacer is noted with leads in the right atrium and right ventricle . Mild enlargement of the cardiac silhouette is re - demonstrated . The aorta is diffusely calcified and tortuous . Pulmonary vasculature is normal . Lung volumes are low with mild chronic interstitial abnormality is noted in the lung bases . No focal consolidation , pleural effusion or pneumothorax is present .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Mild chronic interstitial abnormality , better characterized on previous chest CT