A hidden genetic cholesterol risk called Lp(a) affects about one in five people and can dramatically increase the risk of stroke and cardiovascular death, even when standard cholesterol numbers look normal. Most people with elevated Lp(a) have no symptoms, which means millions may be at serious risk without knowing it. A simple blood test can identify this dangerous condition, and experts now say patients with high levels need more aggressive management of their heart disease risk factors.

What Is Lp(a) and Why Should You Care?

Lp(a), short for lipoprotein(a), is a cholesterol-carrying particle found in the bloodstream that resembles LDL cholesterol, often called "bad" cholesterol. However, Lp(a) includes an extra protein that may make it more harmful to the cardiovascular system. High Lp(a) levels are usually inherited and can increase the risk of heart disease even when standard cholesterol numbers appear normal. The condition typically causes no symptoms, which is why it remains undetected in most people who have it.

Researchers have long known that high Lp(a) is connected to cardiovascular disease, but questions remained about how strongly it predicts future risk in people both with and without existing heart disease. A major new analysis of over 20,000 patients from three National Institutes of Health (NIH) studies has now provided concrete answers about the specific danger levels.

What Did the Research Reveal About Stroke and Heart Death Risk?

Researchers examined stored blood samples from more than 20,000 adults age 40 and older who participated in the ACCORD, PEACE, and SPRINT NIH randomized trials. Participants were divided into groups based on their Lp(a) levels, and researchers tracked major adverse cardiovascular events, including heart attack, stroke, coronary revascularization, and cardiac death. The average participant age was 65.2 years, and about 65% were men.

During a median follow-up period of approximately four years, 1,461 major cardiovascular events occurred among the participants. The findings were striking for patients with the highest Lp(a) levels. Those with Lp(a) levels of 175 nanomoles per liter (nmo/L) or higher faced significantly higher risks compared to those with lower levels:

• Stroke Risk: Patients with the highest Lp(a) levels were 64% more likely to experience a stroke compared to those with lower levels.
• Cardiovascular Death Risk: These patients were 49% more likely to die from cardiovascular causes.
• Major Adverse Events: Patients faced a 31% higher risk of major adverse cardiovascular events overall, which include heart attack, stroke, coronary procedures, and cardiac death.
• Heart Attack Risk: Interestingly, elevated Lp(a) at this threshold was not linked to a higher risk of heart attack specifically.

The association was stronger among participants who already had heart disease compared to those without established disease. This suggests that people with existing cardiovascular conditions and high Lp(a) may face particularly elevated risk.

How to Identify and Manage Your Lp(a) Risk

• Get Tested: Ask your healthcare provider for a simple, low-cost blood test to determine your Lp(a) level. This single test can uncover a dangerous hidden risk factor that standard cholesterol panels often miss.
• Know Your Threshold: If your Lp(a) level is 175 nmo/L or higher, you are at significantly elevated risk and should work closely with your healthcare provider to develop an aggressive management plan.
• Aggressively Lower LDL Cholesterol: If you have elevated Lp(a), focus on reducing your LDL ("bad") cholesterol as much as possible through diet, exercise, and medication if needed, since this is one of the few modifiable risk factors you can control.
• Manage Other Cardiovascular Risk Factors: Work with your healthcare provider to control blood pressure, maintain a healthy weight, avoid smoking, and manage diabetes or other conditions that increase heart disease risk.

"For the first time, we can quantify the specific level of Lp(a) that puts patients at a significantly higher risk of major cardiovascular events, especially stroke and death," said Subhash Banerjee, an interventional cardiologist at Baylor Scott & White in Dallas, Texas. "Regardless of age, patients can take a simple, low-cost blood test to determine whether they have this genetic condition. If elevated Lp(a) levels are detected, they should work closely with their healthcare provider to aggressively lower LDL cholesterol and manage other cardiovascular risk factors as much as possible."

Subhash Banerjee, MD, FSCAI, Interventional Cardiologist at Baylor Scott & White

Why This Discovery Matters Now

The research was presented at the Society for Cardiovascular Angiography and Interventions (SCAI) 2026 Scientific Sessions and the Canadian Association of Interventional Cardiology Summit in Montreal. The timing is significant because new targeted treatment options for high Lp(a) are on the horizon, meaning that identifying who has this condition now could lead to better outcomes in the near future.

Experts estimate that roughly 20% of people have elevated Lp(a), though most do not realize it because the condition typically causes no symptoms. This means millions of people worldwide may be walking around with a significantly elevated risk of stroke and cardiovascular death without any warning signs. The good news is that a simple blood test can identify this risk, and once identified, patients can take steps to manage their cardiovascular health more aggressively.

Researchers added that studying stored biospecimens from completed clinical trials may continue to uncover valuable insights about cardiovascular risk. Future analyses are expected to focus on additional patient groups, including people with chronic kidney disease and peripheral artery disease, which could expand our understanding of how Lp(a) affects different populations.