Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Dual - chamber pacemaker device is noted in the left chest with leads terminating in the right atrium and right ventricle . The heart is mildly enlarged . Atherosclerotic calcification of the aorta is noted . Mediastinal and hilar contours are otherwise unremarkable . Lungs appear mildly hyperinflated . No pulmonary vascular engorgement is seen . Left basilar opacification is noted , with a small left pleural effusion . No pneumothorax is seen , and there is no right - sided pleural effusion . Loss of height of several thoracic vertebral bodies is age indeterminate .
    OUTPUT:
    
1 . Left basilar opacification may reflect atelectasis or infection , with adjacent small left pleural effusion . 2 . Multiple compression fractures in the thoracic spine , of indeterminate chronicity .