It depressing when you are fit and find you've something wrong with you. I've been diagnosed with High Cholesterol, the bad type, but my triglicerides are fine. I'm 6'1" and 13st6, exercise regularly and have a pulse of 54 and normal blood pressure.
I walked in to see the nurse and she went through my lifestyle, well I already avoid saturated fat, don't drink heavily and eat plenty of fruit, veg and oily fish. Basically hereditary, gave me an excuse to get out on the bike more.
Despite the High HDL I'm supposed to have less than 10% chance of having a heart attack in the next 10 years according to the test I had, knowning my luck it will be on the bike.