Hello, I’m Working On A Medical Innovation To Help Children

Hello, I’m working on a medical innovation to help children who have sleep terrors or nocturnal anxiety/panic attacks. The idea was to have a heart rate monitor bracelet to detect heart rate, and when it recognized the elevated heart rate, it would start the treatment. However, heart rate is so individualistic and I can’t find any studies on what a common heart rate for children during sleep terrors might be, or maybe if bpm goes up a certain percentage? Could you help me figure out a way to set heart rate parameters?