Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart remains enlarged . The hilar and mediastinal contours are normal . Lung volumes are low . Lungs are otherwise clear and there is no focal consolidation concerning for pneumonia . There are no pleural effusions or pneumothorax . There is stable positioning of mitral valve replacement . A left pacemaker is in place with two leads terminating in the right atrium and right ventricle , expected locations .
    OUTPUT:
    
No radiographic evidence of an acute cardiopulmonary process . These findings were discussed with Dr . ___ by Dr . ___ ___ telephone on ___ at 4 :50 PM , time of discovery .