Well, I only say to get checked out because I was told by both my primary doctor my electrophysiologist that the combination of passing out and abnormal heart rythms was cause for concern and warrent more tests. It looks like you have had your son's condition analysed by a cardiologist but you are not happy with the cardiologist's reluctance to implant a pacemaker. I have to say, if my cardiologist had been reluctant about putting in my ICD, I would have been thrilled. Everyone's situtation is different. Sometimes fainting in one patient is indicative of something relatively harmless and in another it can be extremely serious. I think the main concern with fainting, is if the patient is prone to VTach or VFib. I have not meant to cause you any more worry. Good luck!