Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided dual - chamber pacemaker device is noted with leads terminating in the right atrium and right ventricle , unchanged . Heart size remains mildly enlarged . The aorta is tortuous . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . There is minimal subsegmental atelectasis in the left lower lobe . Lungs are otherwise clear without focal consolidation . No pleural effusion or pneumothorax is present . No acute osseous abnormalities identified .
    OUTPUT:
    
No acute cardiopulmonary abnormality .