🧬 Heart attack despite a healthy lifestyle: watch out for Lp(a)

Here is a scenario that may be surprising: a person in great shape, athletic, with good LDL cholesterol levels, and yet they have a heart attack.

This paradox may be explained by a little-known cholesterol particle: lipoprotein(a), or Lp(a). Unlike standard LDL, this molecule is strongly influenced by genetics and is not affected by diet or exercise. As a result, it can accumulate silently in the arteries, increasing the risk of cardiovascular events even in healthy individuals.

To understand why, let's look at its structure. Lp(a) resembles LDL but has an additional protein, apolipoprotein(a). This part makes it stickier and promotes plaque formation in the arteries. It may also encourage blood clotting. Studies show that high Lp(a) levels are linked to an increased risk of heart attacks and strokes, independently of other risk factors. This link is continuous: the higher the level, the greater the danger.


Unlike LDL cholesterol, Lp(a) is not influenced by diet or exercise, but mainly by heredity. Levels are set early in life and remain stable. This largely genetic characteristic explains why some people develop cardiovascular disease despite a healthy lifestyle. Factors such as menopause or kidney disease can slightly alter levels, but the core is innate.

Currently, few options are available to reduce Lp(a). Statins, which are very effective against LDL, have almost no effect on it. Some newer drugs, like PCSK9 inhibitors, modestly lower it by 15 to 30%. However, a new class of treatments promises a dramatic reduction. Using gene silencing, these molecules prevent the liver from producing Lp(a). Early trials show reductions of 80 to 90%.

You may wonder whether you should have your Lp(a) tested. This test is not included in the standard lipid panel. You need to specifically request it. International guidelines recommend measuring it at least once in adulthood, especially if there is a family history of early heart disease or unexplained risk. Since levels are stable, a single test is often sufficient.

It can be frustrating to discover that you have a high Lp(a) level, because you cannot easily change it. But think of it as an indicator of overall risk. Other factors are under your control: LDL cholesterol, blood pressure, smoking, physical activity, diet, and diabetes management. By optimizing these, you reduce your total cardiovascular risk, even if Lp(a) remains high.

Research on Lp(a) is progressing rapidly. If ongoing clinical trials confirm that the new targeted therapies reduce cardiac events, screening and treatment could become routine. In the meantime, awareness is a key first step. Talk to your doctor if you have concerns, especially with a family history. And remember that the foundations of a healthy heart remain the lifestyle habits you can manage.