Lucky
I wasn't riding when I had mine but sat in a traffic jam doing nothing for an hour. Mine started as indigestion that got worse. I was sweating profusely and felt sick. Tell tale sign was that I took on a Khaki colour in my face---It had no colour except for my tan. Phoned for an ambulance and spent 4 days in ER under and out with drugs. I had a triple 3 months later and 3 months later did a 40 miler.
It does not matter how fit you feel or are. Heart attacks can hit you anytime. I was fit and in training for a hard ride and probaly at my fittest for years. Sunday before I had mine and I slaughtered my riding partner on a 65 mile offroad.
And please do not get complacent-- 2 years later and my riding partner had a heart attack on a ride and died. I was lucky-My mate wasn't.
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How long was I in the army? Five foot seven.
Spike Milligan