13-Year-old with syncope while standing in line for lunch

Case

Hi, we have a 13-year old girl who was brought in by ambulance after she passed out today at school. She was standing in line at the cafeteria during lunchtime. The teacher reports that she fell to the ground while in line and woke up almost immediately. The teacher stated that she looked pale. She looks well now and the vitals are all stable. Should we be concerned? Should we do any testing?