Nothing personal in my critique, you have a lot of company in your opinion and the professional cardiology associations have done a piss poor job of communicating fundamental knowledge even to cardiologists, so confusion in the public is hardly a surprise.
As appealing as your statement sounds on a folksy level (“Personal responsibility! Cardiologist couldn’t tell me how many years longer I’ll live on a statin!”), especially to the anti-statin crowd, it’s deadly wrong. We’re talking about #1 cause of death and disability worldwide, and there’s zero doubt about what the primary cause is and what prevents it.
In the last 10 years, the critical mass of data has made the relationship between cumulative LDL exposure and cardiovascular lifespan one of the most firmly established cause-and-effect links in all of medicine. Right alongside smoking and lung cancer.
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Medical science doesn’t talk like this very often. “Indisputable” isn’t thrown around lightly.
Yes, lifestyle matters; it modifies inflammation, insulin sensitivity, blood pressure, and weight. But LDL is the single most quantifiable driver of any disease, in this case atherosclerosis, that modern science has conclusively identified, and it’s primarily determined by genetics. Your liver makes the vast majority of LDL, 80%, and because the liver also removes LDL from blood it’s responsible for 95% of overall LDL levels. That’s all genetically determined by how many LDL receptors your liver has, how well they work, and how much PCSK9 you make (which interferes with liver LDL receptors removing LDL from blood). People who genetically don’t produce PCSK9 don’t have any plaque at all, near 0 LDL, and therefore no cardiovascular disease. They live long perfectly healthy lives until they die from something other than clogged arteries.
Lower LDL means fewer plaques, fewer ruptures, fewer heart attacks, and, on a population level longer life.
What you’ve unfortunately discovered is that LDL 80, long assumed “fine”, isn’t, and that decades of that level of cumulative cholesterol exposure lays down enough plaque that it becomes a problem later in life. All the other factors, from lifestyle, to inflammation and Lp(A) only mattter If LDL is high enough.
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This somewhat childish illustration caught my eye because it makes to very good points:
1) CUMULATIVE LDL exposure over a lifetime determines risk, starting in childhood.
and
2) Even if you’re on the “Holy shit why didn’t they figure this out before I was in my 40s-50s!!” and stuffed full of plaque, is that by aggressively lowering LDL later in life, risk DROPS as time passes, because “old plaque” stabilizes and becomes less threatening.
If your LDL had been below 40 for a lifetime, regardless of anything else, you would not accumulate plaque, and therefore have a CAC score of zero, never have the risk of angina, peripheral artery disease, need a bypass or stent, of suffer an ischemic stroke or heart attack. We knew this for a fact. LDL is the building block of all plaque.
Only with recently developed meds, specifically Ezetimebe and PCSK9 inhibitors is getting LDL down below accumulation levels realistically possible for most people, and soon, in a few years, especially with “one time PCSK9 inhibiting vaccines”, “primordial” (instead of “primary”) prevention will become the standard, tackling >70 LDL in people starting at 18 or earlier, and atherosclerosis the #1 cause of death will start to go extinct.
The cold reality is the only reason <40 LDL isn’t a target for all right now is money. Period. Not enough expensive heart surgeries saved via early intervention, and of those who will die as a result of not lowering LDL well before 40, most fatalities will be at or near retirement age so therefore those deaths don’t “cost” much vs the expense of many years of expensive meds like Repatha, doctors visits, blood tests, etc.
TLDR: Get your LDL as low as possible, by whatever means necessary. With LDL below 40 none of the other factors will matter much. Your risk will be reduced almost as low as is possible with lipids. ~95% of total controllable risk. At that point, “residual risk”, ie, everything else, Lp(a), HDL, ApoB, can only shave a few more percentage points off.*
*except inflammation. which is a still major risk factor for a few years after stopping fresh plaque accumulation, until the plaque finally hardens and becomes “low risk historical accumulation”.