Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left pectoral pacemaker is unchanged in position with two leads terminating in the right atrium and right ventricle as before . The patient is status post median sternotomy and aortic valve repair with aortic valve prosthesis , unchanged in position and intact - appearing sternotomy wires . The cardiac silhouette and mediastinal contours are mildly increased in size in comparison to the most recent prior study likely attributable to slightly decreased lung volumes compared to the prior exam . The mediastinal and hilar contours are within normal limits . Hazy opacification of the bilateral lung bases is likely related to underpenetration of soft tissues on technique . There is no focal consolidation concerning for pneumonia , pleural effusion or pneumothorax . No overt pulmonary edema is present .
    OUTPUT:
    
No acute cardiopulmonary abnormality .