Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and aortic valve replacement . Heart size is borderline enlarged . The mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is present . An electronic device is noted within the left anterior chest wall .
    OUTPUT:
    
No acute cardiopulmonary abnormality .