Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided pacemaker device is noted with leads terminating in the right atrium and right ventricle , unchanged . The patient is status post median sternotomy and CABG with an aortic CoreValve device again noted . Fractures of several median sternotomy wires are re- demonstrated . The heart remains mildly enlarged . Mediastinal contour is similar . There is mild pulmonary vascular congestion . Patchy opacity in the left lung base could reflect an area of atelectasis though infection or aspiration is not excluded . No pneumothorax is identified .
    OUTPUT:
    
Mild pulmonary vascular congestion . Patchy left basilar opacity , possibly atelectasis but infection or aspiration are not excluded .