Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single - lead pacemaker is unchanged in position , with the lead terminating in the right ventricle . The cardiac silhouette is normal in size . The mediastinal and hilar contours are stable with mild tortuosity of the descending thoracic aorta . The lungs are clear aside from unchanged left basilar atelectasis or scarring . No focal consolidation , pleural effusion , or pneumothorax is seen . The pulmonary vasculature is not engorged and there is no overt pulmonary edema . Degenerative changes of the thoracic spine are similar in appearance to the prior study .
    OUTPUT:
    
No acute cardiopulmonary process .