Thanks for writing in.
Normal random blood glucose
levels in children range between 100-140 mg/dL. Definitely, there is a chance that he could have fainted if he did not eat or drink anything for a long time. I would suggest you make him eat at frequent intervals and keep him well hydrated.
But an unusual pattern in the EKG definitely warrants an evaluation by a pediatric cardiologist. This would help us rule out any conduction disorders in the heart.
Hope this helps.