Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided dual - chamber pacemaker device is present with leads terminating in the right atrium and right ventricle . Mild - to - moderate enlargement of the cardiac silhouette is stable . The aorta remains tortuous with aortic knob calcifications again noted . The pulmonary vascularity is normal . Chronic blunting of the left costophrenic angle is again demonstrated , with minimal subsegmental atelectasis at the lung bases . No focal consolidation , pleural effusion or pneumothorax is present . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .