I am a carrier – but I was told confirmation of carrier only status can only be confirmed by MRI, which I had done to finalize that confirmation. I am 51 years old, however. My son was just diagnosed with HCM this past year and he is 29 years old. Very active in sports throughout high school, but that was because we had no idea this gene was in our family. Based on The age of your child (your statements make it sound like high school or younger?) I would not trust carrier status confirmation by echo and ECG only. It may just be too early in his lifetime to confirm carrier status at all.