Two heart attacks and two stents later, you forget about the science and just go with the flow, on the basis that che sera, sera.
Preventative measures? Don't eat great food, don't drink anything nice; don't have too much sex (which beta blockers may take away from you anyhow, depends); don't develop high pressure in your eyes because the beta blocker-laded eye drops for that will combine with the betas for your heart and cut blood pressure even more, and so the blood rush to your digestive system will leave your brain - literally - cold and empty, making you faint into your lunch plate. It took years - again, literally - for the doctors to give up and hand me non-beta eye drops; maybe they cost more, no idea. Smoke? If you still do that, ignore my advice above and go Havana and die younger. It'll serve you bloody right. Think of how many other people's meals you will have ruined with your smokescreens!