I understand your need for knowledge concerning this illness. As an adult with this disease I long for knowledge and could not imagine if it were my child I needed it for instead of myself. I am so sorry for your loss. There is a doctor in Monroe, LA who has treated several children with POTS. He is the doctor of my nephew who was born with 5 holes in his heart and is now a healthy normaly little boy. I will put the address and number below and you can follow-up with this doctor if you wish. He is a world reknowned pediatric caridologist and flies all over the world to give lectures and teach procedures. I hope you can find help somewhere. Best Wishes, Jamie Jordan Dr. Terry King 3510 Magnolia Monroe, LA 71203 318-323-1100