Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left pectoral pacemaker is unchanged in position with two leads . The right atrial lead appears in appropriate position on this single frontal view . The right ventricular lead appears retracted into the right atrium compared to the most recent prior study of ___ . There is improved aeration at the right base from the most recent prior study with persistent elevation of the right hemidiaphragm . No significant focal consolidation , pleural effusion , or pneumothorax is detected . The pulmonary vasculature is not engorged . The cardiac silhouette is mildly enlarged but stable . The mediastinal and hilar contours are within normal limits and unchanged . The visualized upper abdomen shows surgical clips in the right upper quadrant compatible with prior cholecystectomy .
    OUTPUT:
    
Retraction of right ventricular lead into the right atrium compared to the most recent prior study of ___ . Findings were reported by Dr . ___ to Dr . ___ ___ cardiology via telephone at 3 :50 p .m . on ___ .