For decades, cholesterol (LDL, HDL, triglycerides) has been the central focus of cardiovascular prevention. But in recent years, another player has emerged: lipoprotein(a), or Lp(a).
Many patients have never heard of it, yet research shows it may be one of the most important genetic risk factors for heart disease.
What is lipoprotein(a)?
Lipoprotein(a) is a particle in the blood similar to LDL cholesterol, but with an added protein called apolipoprotein(a). This structure makes it more likely to contribute to plaque buildup, inflammation, and clot formation in arteries.
Unlike LDL cholesterol, which is heavily influenced by diet and lifestyle, Lp(a) levels are largely genetically determined.
What the research shows
- Independent risk factor: Large cohort studies, including data from the European Atherosclerosis Society and Framingham Heart Study, confirm that elevated Lp(a) increases risk for heart attack, stroke, and aortic stenosis, even when LDL and other cholesterol levels are normal.
- Prevalence: Elevated Lp(a) is found in about 20 percent of the population. Many are unaware because it is not measured in routine lipid panels.
- Treatment limitations: Current statins do not lower Lp(a) meaningfully. Emerging therapies, such as antisense oligonucleotides (e.g., pelacarsen), are in late-stage clinical trials and show promise in dramatically lowering Lp(a) levels.
Why this matters for patients
Because Lp(a) is inherited, family history is often the clue. A patient with a strong history of premature heart disease may have normal cholesterol, yet still be at higher risk because of elevated Lp(a). Identifying this helps explain risk and tailor prevention strategies more effectively.
What patients can do
- Ask for the test: Lp(a) can be measured with a simple blood test, usually once in a lifetime, since levels remain stable.
- Focus on overall risk reduction: Even though we cannot yet directly treat high Lp(a), lowering LDL cholesterol aggressively, controlling blood pressure, not smoking, and maintaining a healthy lifestyle help offset the risk.
- Family awareness: If one person has elevated Lp(a), relatives may benefit from testing as well.
Conclusion: a new frontier in prevention
Cholesterol will always matter, but Lp(a) reminds us that cardiovascular risk is more complex than a single number. By bringing this test into routine preventive care, especially for patients with family history of early heart disease, we move closer to truly personalized medicine.
For now, knowledge is power: knowing your Lp(a) status can shape a smarter prevention plan until targeted therapies arrive.
Monzur Morshed is a cardiologist. Kaysan Morshed is a medical student.
