Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is present . Pacemaker with electrodes in expected positions in the right atrium and right ventricle . Atherosclerotic calcifications are noted in the aortic knob . The mediastinal and hilar contours are unremarkable . The pulmonary vasculature is normal . Low lung volumes . Lungs are clear . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities with mild to moderate degenerative changes of the visualized thoracic spine noted .
    OUTPUT:
    
Moderate cardiomegaly . No acute cardiopulmonary abnormality .