I never actually passed out as a child, but up to the age of 12, I did have 5 episodes of presyncope. None of these occurred during exercise and I never felt any discomfort in my chest or neck during these episodes, but talking to other normal people I know, nobody reported ever experiencing anything remotely close to what I did. My mom is the only person I know who said she also almost passed out a few times when she was a child. She also has frequent ectopic beats just like me. Could this be indicative of some congenital heard defect?