Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left pectoral single - chamber pacemaker is in place with a single lead terminating in the right ventricle . The cardiac silhouette is moderately enlarged but stable . The mediastinal contours are within normal limits with mild tortuosity of the aorta . The hilar contours are within normal limits and stable . The lungs are clear without focal consolidation , pleural effusion or pneumothorax . The pulmonary vasculature is not engorged . Two screws are noted in the left humeral head . Moderate degenerative changes are noted in the bilateral acromioclavicular joints . Moderate degenerative changes are noted in the lower thoracic spine . There is kyphotic curvature .
    OUTPUT:
    
Appropriate pacemaker lead placement with clear lungs .