Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided AICD and its 2 leads are unchanged in position . Patient is post CABG with intact median sternotomy wires and mediastinal clips . Mildly enlarged heart is stable . Mediastinal and hilar contours are unchanged . Lung volumes are low , and there is left basilar atelectasis . No pleural effusion , focal consolidation , or pneumothorax .
    OUTPUT:
    
Left basilar atelectasis , but no focal consolidation .