Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The cardiac and mediastinal silhouettes are stable with the cardiac silhouette persistently enlarged . Two lead left - sided pacemaker is again seen , unchanged in position . There are slightly low lung volumes and there is persistent mild elevation of the right hemidiaphragm . Slight blunting of the right costophrenic angle is stable . Stable right base scarring is again seen . There is no evidence of pneumothorax . No overt pulmonary edema is seen . There may be mild pulmonary vascular congestion .
    OUTPUT:
    
Stable cardiomegaly with possible mild pulmonary vascular congestion , without overt pulmonary edema .