Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pacemaker device / AICD is re - demonstrated with leads in unchanged positions in the right atrium and right ventricle . Mild cardiomegaly is stable . The mediastinal and hilar contours are unremarkable . The pulmonary vascularity is not engorged . The lungs are clear . No pleural effusion or pneumothorax is visualized . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .