Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided pacemaker device is noted with leads terminating in right atrium and right ventricle . Patient is status post median sternotomy and aortic valve replacement . Cardiac , mediastinal and hilar contours are normal . Lungs are clear . No pleural effusion or pneumothorax is present . There is no pulmonary vascular congestion . There are mild degenerative changes in the thoracic spine . Cholecystectomy clips are noted in the right upper quadrant the abdomen .
    OUTPUT:
    
No acute cardiopulmonary abnormality .