I have a slight thickening but it doesn't interfere with my life. I think how it effects you depends on how severe it is. You didn't say why the doctor did an echo cardiogram. Were you having systems? If you were, I'd certainly see the doctor before the marathon, but even if not, it's a good idea.
There's a good article about it here, but I'll warn you it's a bit scary. my.clevelandclinic.org/heart/disorders/hcm
Some people are always grumbling because roses have thorns. I am thankful thorns have roses. -- Alphonse Karr
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