About 0.6% of people under 40 have the most common type of heart disease
https://www.heart.org/idc/groups/heart-public/@wcm/@sop/@smd...
Again pointing out that it is the 2nd most common killer vastly overestimates its evolutionary impact. The same is true of cancer.
The point where these get called a precursor to heart disease is largely semantics. But they do impact heath before it’s noticeable as a problem.
Target heart rate declining and blood pressure rising with age in no way implies that most people who later die of heart disease are somehow less reproductively fit when they are younger.
Heredity is one of the stronger predictors of heart disease so it’s got a strong genetic component beyond diet and lifestyle. So, it’s really just a question of how early meaningful symptoms show up as the physical differences already exist during people’s reproduce years.
It seems like an obvious test if do differences in Forearm arteries have fewer heart attacks. And do they correlate with higher blood pressure in people’s 20’s to 30’x.
Only if as you say the meaningful symptoms show up during common reproductive years.
So far I see no evidence that that is the case.
>Heredity is one of the stronger predictors of heart disease so it’s got a strong genetic component beyond diet and lifestyle.
Again there is no evidence that it is common that hereditary heart disease that generally affects people 50+ has meaningful symptoms during reproductive years.
And there is even less evidence that these symptoms are meaningful enough to impact fertility to such an extent that it creates significant short term evolutionary pressure.
You're taking 1 condition which is common in later life and saying: well maybe some people with that condition actually develop it earlier in life, and just maybe some people that develop it earlier have some externally significant symptoms, and maybe some of those people have specific symptoms that would make them less likely to reproduce all else being equal.
Each step of that funnel is a complete unknown, and each step diminishes the overall impact that genes that control the most common forms of hereditary heart disease have on reproductive fitness.