Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pacemaker device is noted with leads terminating in the right atrium , right ventricle , and coronary sinus . The patient is status post median sternotomy and CABG . The cardiac silhouette size is moderately enlarged . The mediastinal and hilar contours are within normal limits and unchanged . There is minimal pulmonary vascular congestion . Blunting of the costophrenic angles posteriorly on the lateral view is chronic and compatible with small effusions . There is no pneumothorax . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
Mild pulmonary vascular congestion and trace bilateral pleural effusions .