I think the propranolol is to keep his heart rate down. Resting HR prior to the tilt was 53. Within 3 minutes of raising the head up, his HR went to the 90's, then dropped and went into asystole. I think his theory is if the heart rate does not go up, it will not drop. The test was just done last Tuesday. He has a follow-up with the same cardiologist this Friday and a new appointment with a pediatric cardiologist June 1. Unfortunately, I work for a hospital. Because of that, the network on their insurance is somewhat limited. I think they want us to utilize them as much as possible. It does cover several doctors in Indiana. However, it does not cover any of the specialists in the dysautonomia area. They are all out of state. Thanks for all the information.