So what does THAT mean??

I got a letter from the SOBI (Southern Oklahoma Blood Institute) saying that after testing my last whole blood donation (the one that got me very sick) they tested the blood platelets in my blood.
Apparently I have 395,000 per unit ~ which is high and would I be willing to be a blood platelet donor? Well sure........ but wait! What does that mean.
I know blood platelets are the clotting part of your blood, and I got a lot of them. But what does that mean to a person who has a family history of heart disease? Does that mean I am develop Heart Disease - do I already have heart disease??

The internet doesn't help - one site says "Oh no! You're going to die any day now." and the next says, "It's not a problem."

I guess I better call someone who knows..........

~sigh~