I have a 13 year old boy who has had occasional chest pain in his sternum that radiates to his left neck and shoulder during running. I thought that it was possible asthma due to the fact that his younger brother has it. I am a respiratory therapist and did not note that he had any problems with shortness of breath or coughing. So at his physical last week his doctor did an EKG which found a RBBB. Now I know that this is a common finding. He is not overweight and has no other health problems. I have noticed though that his hands become dusky blue when he is stressed or cold. Then they become bright red. I assumed that he had reynauds. Can this all be due to whatever is going on? He has an ECHO scheduled for Wednesday. How concerned should I be at this point and what questions should I ask the physician when we follow up?