Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided dual - chamber pacemaker leads terminating in the right atrium and right ventricle are noted . There is mild enlargement of the cardiac silhouette , which is stable . The aorta remains tortuous and diffusely calcified . Pulmonary vascularity is normal . The lungs remain hyperinflated . No pleural effusion or pneumothorax is seen . There is minimal atelectasis at the lung bases , but no areas of focal consolidation . No acute osseous abnormality is present .
    OUTPUT:
    
Minimal atelectasis at the lung bases , but no evidence of congestive heart failure or pneumonia .