Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy . A left - sided pacer device is noted with lead terminating in the right ventricle . Mild enlargement of the cardiac silhouette is similar to the previous study . The aorta remains tortuous . Mediastinal and hilar contours are otherwise unremarkable , and the pulmonary vasculature is not engorged . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary abnormality .