Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are obtained . The patient is status post median sternotomy and CABG . Dual - lead left - sided pacemaker is again seen with leads extending to the expected positions of the right atrium and likely right ventricle . There is blunting of the left costophrenic angle most consistent with a small left pleural effusion . Left base opacity may be due to combination of pleural effusion and atelectasis , although consolidation is not excluded . There is mild central pulmonary vascular congestion . The cardiac silhouette is mildly enlarged . Mediastinal contours are similar compared to ___ . There is diffuse osteopenia .
    OUTPUT:
    
Left pleural effusion with overlying atelectasis . Left base opacity may be due to combination of pleural effusion and atelectasis , although consolidation is not excluded . Mild pulmonary vascular congestion .