My dad is 75 yo, lifelong non smoker, non drinker, vegetarian (he's Hindu), weighs about 175, walks a few times a week. Just had an NSTEMI secondary to 3v disease. So have two of his brothers. And his dad died of a stroke 50 yrs ago.
Thanks to genetics I'm doomed no matter what I do so I'm just gonna keep pounding cabernets and wagyu ribeyes while staying relatively low carb, continue taking fish oil (and probably a statin at some point although the evidence for primary prevention is weak), and hope medical therapy and PCI has advanced bigly before I go get a coronary CT at age 50 and see the bad news.