My Grand-daughter who is 15 started having episodes of feeling faint when at rest, ie: sitting in class at school, waking up in the a.m. also she felt as though her heart was racing as well during these episodes. Her Cardiologist performed the standard 24 hour EKG which showed her heart rate dropping to 10-15 BPM and at times stopping entirely for 5 second intervals during a two hour period while sleeping. The fainting/racing heart episodes did not co-incide with the low heart rate at all, her heart was normal during the documented fainting/racing heart episodes, and she had a traedmill test which showed her heart to function normally during physical activity, She continues to play sports, Track, Soccer, Snowboarding, Wakeboarding with no ill effects. The Cardiologist is talking Pacemaker to regulate her heart during sleep. Any input? Would you suggest a week long EKG monitor, or is time critical?