Lp(a) Test: Uncover a Hidden, Inherited Cardiovascular Risk
Standard cholesterol panels don’t check for it, but Lp(a) can raise your risk of heart attack and stroke even when your other numbers look fine. An Lp(a) Test is a simple blood test that measures this inherited risk factor, giving you and Dr. Sunny Malhotra a clearer picture of your true cardiovascular risk.
What Is an Lp(a) Test?
An Lp(a) Test, also called a lipoprotein test for Lp(a) or an Lp(a) blood test, measures the amount of lipoprotein(a) circulating in your blood. It’s a single blood draw, and for most patients, it doesn’t require fasting beforehand.
Lp(a) is a cholesterol-carrying particle, similar in some ways to LDL cholesterol, but with an added protein component that makes it more strongly linked to plaque buildup and blood clot formation in the arteries. Unlike LDL, which shifts with diet and lifestyle, Lp(a) levels are set almost entirely by genetics and stay fairly stable throughout adult life.
That’s a key reason this lab test for Lp(a) is different from routine cholesterol testing. Most patients only need it done once. A single result, in most cases, holds useful information for years.
Why Might Lp(a) Testing Be Recommended?
Lp(a) testing may be recommended when your standard cholesterol results don’t fully explain your cardiovascular risk, or when your family history suggests something routine bloodwork might be missing.
A doctor may suggest an Lp(a) Test if you have:
- A family history of premature heart attack or stroke, particularly in a parent or sibling before age 55 in men or 65 in women
- Cardiovascular disease at a younger age than expected, without other obvious risk factors
- Elevated LDL cholesterol that hasn’t responded as expected to treatment
- A personal or family history of aortic valve disease
- No clear explanation for a heart attack or stroke after standard risk factors have been reviewed
High Lp(a) is generally silent. It doesn’t cause symptoms on its own, which is exactly why testing, rather than waiting for a warning sign, is the only reliable way to know your level.
Who May Benefit From an Lp(a) Blood Test?
You don’t need to already have heart disease to benefit from knowing your Lp(a) level. Several groups of patients tend to get the most useful information from this test:
- Patients with a strong family history of heart disease, especially if a relative had a heart attack, stroke, or bypass surgery at an unusually young age
- Patients with high LDL cholesterol that seems out of proportion to their diet and lifestyle
- Patients who’ve already had a cardiac event and want a fuller picture of what may have contributed to it
- Adults with no personal history of heart disease who simply want a one-time baseline, since many international lipid guidelines now support Lp(a) testing at least once in adulthood
If any of this sounds like your situation, it’s worth raising during a preventive cardiology visit rather than waiting for it to come up on its own.
How Does Lp(a) Testing Work?
Getting an Lp(a) blood test through Dr. Malhotra’s practice follows a straightforward process, built around your existing cardiovascular risk picture rather than a stand-alone number.
Consultation: Dr. Malhotra reviews your personal and family cardiovascular history to determine whether Lp(a) testing makes sense for you.
Blood draw: The test itself is a standard blood sample, typically done without fasting.
Lab analysis: Your Lp(a) level is measured and reported, usually in either mg/dL or nmol/L depending on the lab.
Results review: Dr. Malhotra interprets your result in the context of your overall cardiovascular risk, not as an isolated number.
Because Lp(a) is reported in two different units that don’t convert to each other with a simple formula, results are always reviewed against the specific lab’s reference range rather than compared loosely across different reports.
What Do Lp(a) Test Results Mean?
Interpreting an Lp(a) Test result depends on the units used, the actual value, and your broader cardiovascular risk profile, not on the number alone.
Under the 2026 ACC/AHA guideline, an Lp(a) level of 125 nmol/L, or roughly 50 mg/dL, is generally considered a risk-enhancing threshold. Levels near 250 nmol/L, or about 100 mg/dL, are associated with a further increase in estimated long-term cardiovascular risk. Canadian guidance has historically referenced a similar threshold, around 50 mg/dL or 100 nmol/L, for intensifying risk-factor management.
It helps to keep a few things in mind:
- Lp(a) is a risk factor, not a diagnosis: An elevated result doesn’t mean a heart attack or stroke is inevitable.
- It’s one piece of a larger picture: Your Lp(a) result is weighed alongside LDL cholesterol, blood pressure, family history, and other established risk factors.
- A normal result is still useful information: It helps rule out one contributor to unexplained cardiovascular risk.
What Happens After Your Lp(a) Test?
Once your Lp(a) Test results are in, the conversation shifts from testing to what, if anything, should change in your care plan.
Depending on your result and overall risk profile, next steps may include:
Closer attention to modifiable risk factors, including LDL cholesterol, blood pressure, blood sugar, weight, physical activity, and smoking status.
More intensive LDL-lowering treatment, since reducing LDL remains one of the clearest ways to offset elevated Lp(a)-related risk.
A referral for family screening, particularly if your Lp(a) level is significantly elevated, since Lp(a) runs in families.
No change at all, if your result is within a normal range and your other risk factors are already well controlled.
Treatment decisions are always individualized. Dr. Malhotra works through your specific result and risk profile with you directly, rather than applying a one-size-fits-all protocol.
What Happens After Your Lp(a) Test?
Dr. Sunny Malhotra is a board-certified cardiologist with a clinical focus that includes lipidology and advanced lipid management, alongside general cardiology, heart failure, and preventive cardiology. He earned his medical degree from the Royal College of Surgeons in Ireland, completed his Internal Medicine residency at Boston University Medical Center, and trained in Cardiovascular Medicine at New York Presbyterian.
His practice already runs an established advanced lipid management program for patients across Mississauga, Brampton, Milton, and Caledon, addressing markers like Lp(a) and ApoB as part of a fuller cardiovascular risk assessment, not as an isolated add-on test. For patients who want more background before their appointment, the practice also publishes patient-focused explainers on what an elevated Lp(a) result can mean and why Lp(a) often goes undetected.
If you’re already managing high cholesterol with Dr. Malhotra, an Lp(a) Test can slot naturally into your existing cholesterol treatment plan as an additional data point, rather than a separate process.
FAQs
Do I need to fast before an Lp(a) blood test?
No. Lp(a) testing is typically done without fasting, unlike some other lipid panel components. Confirm with the clinic ahead of your appointment in case additional bloodwork is being drawn at the same visit.
How often do I need to repeat an Lp(a) test?
For most patients, once. Lp(a) levels are largely determined by genetics and tend to stay stable through adulthood, so a single lifetime test is usually sufficient unless your doctor has a specific reason to retest.
Can I lower my Lp(a) level through diet or exercise?
Lp(a) doesn’t respond to diet and exercise the way LDL cholesterol does, since it’s genetically determined. Management usually focuses on controlling the cardiovascular risk factors that can be changed, like LDL cholesterol and blood pressure.
Is a high Lp(a) result covered by insurance in Ontario?
Coverage varies by provider and plan. It’s best to check directly with your insurer or ask the clinic about current billing details for your specific situation.
Should my family members get tested if my Lp(a) is high?
It’s worth discussing. Since Lp(a) is largely inherited, a significantly elevated result in one family member is often a reason for close relatives to consider testing as well. Dr. Malhotra can talk through whether that makes sense for your family.
Medical Disclaimer
This page is for general educational purposes and does not replace individualized medical advice, diagnosis, or treatment.
If you have a family history of heart disease, an unexplained cardiovascular event, or you’re simply curious about a risk factor standard bloodwork doesn’t cover, an Lp(a) Test can fill in a gap your current results might be missing. Book an appointment with Dr. Sunny Malhotra’s cardiology and lipidology practice, serving Mississauga, Brampton, Milton, and Caledon.