When people think about heart health, cholesterol is often the first number that comes to mind. While cholesterol is important, it is only one piece of the cardiovascular risk picture.
Today, healthcare professionals increasingly look at multiple factors—including blood pressure, cholesterol, blood sugar, body weight, kidney function, smoking status and age—to understand an individual’s overall cardiovascular risk. The American Heart Association’s PREVENT equations, for example, incorporate cardiovascular, kidney and metabolic health factors to estimate the risk of cardiovascular disease.
Additional measurements such as lipoprotein(a), apolipoprotein B and coronary artery calcium may provide further information for selected individuals.
So, which numbers are worth knowing?
1. Blood Pressure
Blood pressure is one of the most important numbers for cardiovascular health.
A reading contains two values:
- Systolic pressure: pressure in the arteries when the heart beats.
- Diastolic pressure: pressure when the heart relaxes between beats.
Persistently high blood pressure can damage artery walls and increase the risk of heart attack, stroke, heart failure and kidney disease. It often causes no obvious symptoms, which is why regular measurement is important.
The American Heart Association considers less than 120/80 mm Hg an optimal blood pressure level, although individual assessment and diagnosis should be handled by a healthcare professional.
Why it matters: Even moderately elevated blood pressure over many years can contribute to cardiovascular risk.
2. LDL Cholesterol
LDL-C (low-density lipoprotein cholesterol) is commonly called “bad cholesterol.”
High levels of LDL-C can contribute to the buildup of cholesterol-containing plaque in artery walls, increasing the risk of atherosclerotic cardiovascular disease.
Importantly, there isn’t one LDL-C target that is appropriate for everyone. The 2026 ACC/AHA dyslipidemia guideline uses different treatment goals according to an individual’s cardiovascular risk.
For people at increased cardiovascular risk, lowering LDL-C can be an important part of risk reduction.
3. Non-HDL Cholesterol
Another useful number is non-HDL cholesterol.
It represents cholesterol carried by several potentially atherogenic particles rather than focusing only on LDL-C.
The American Heart Association notes that non-HDL cholesterol can be useful for cardiovascular health assessment and can be measured without fasting.
This can be particularly helpful when evaluating the overall lipid profile rather than concentrating on a single cholesterol value.
4. HDL Cholesterol
HDL-C (high-density lipoprotein cholesterol) has traditionally been called “good cholesterol.”
However, cardiovascular risk should not be judged simply by having a high HDL number.
A person can have a favorable HDL level and still have other important risk factors, such as high blood pressure, diabetes, elevated LDL-C or high Lp(a).
The newer approach is therefore to consider the complete cardiovascular risk profile, rather than treating HDL as a standalone measure of protection.
5. Triglycerides
Triglycerides are another type of fat measured in a standard lipid panel.
Elevated triglycerides can be associated with metabolic conditions and cardiovascular risk. They can also provide additional information when interpreted alongside LDL-C, HDL-C, blood glucose and other health factors.
The 2026 ACC/AHA dyslipidemia guideline specifically recognizes elevated triglycerides as a factor that can influence cardiovascular risk assessment and treatment decisions.
6. Lipoprotein(a) — Lp(a)
One of the most important additions to modern cardiovascular risk assessment is lipoprotein(a), or Lp(a).
Lp(a) is a cholesterol-carrying lipoprotein that is largely determined by genetics. A high level can increase the risk of heart disease and stroke, even when a person’s standard cholesterol results appear relatively reassuring.
The 2026 ACC/AHA dyslipidemia guideline recommends that every adult have Lp(a) measured at least once in their lifetime.
An Lp(a) level of 125 nmol/L or higher (50 mg/dL or higher) is considered associated with increased cardiovascular risk, although the meaning of a result depends on the individual’s overall risk profile.
Because Lp(a) is primarily inherited, lifestyle changes generally do not substantially lower the level. However, controlling other modifiable cardiovascular risk factors can still be important.
7. Apolipoprotein B — ApoB
Apolipoprotein B (ApoB) measures the number of certain atherogenic lipoprotein particles circulating in the blood.
Why might this matter?
Two people can have similar LDL-C levels but different numbers of atherogenic particles. ApoB can therefore provide additional information in certain situations.
The 2026 ACC/AHA guideline says ApoB measurement can be useful particularly in people with elevated triglycerides, diabetes, cardiovascular-kidney-metabolic syndrome or established cardiovascular disease, especially when LDL-C or non-HDL-C appears to be at goal.
ApoB is not necessarily required for everyone, but it can help refine cardiovascular risk assessment when standard lipid measurements don’t tell the complete story.
8. Blood Sugar and HbA1c
Heart health is closely connected to metabolic health.
Two commonly used measurements are:
Fasting Blood Glucose
This measures blood sugar after fasting.
HbA1c
HbA1c provides an estimate of average blood glucose levels over approximately the previous two to three months.
Persistently elevated blood glucose can damage blood vessels and increase cardiovascular risk. Diabetes is also an important factor included in contemporary cardiovascular risk assessment. www.heart.org
Identifying prediabetes or diabetes early can create an opportunity to address cardiovascular risk before complications develop.
9. Kidney Function
The connection between the kidneys and cardiovascular system is increasingly recognized as an important part of heart-risk assessment.
Kidney function can be evaluated using measures such as estimated glomerular filtration rate (eGFR).
Reduced kidney function is associated with cardiovascular risk and is incorporated into the AHA PREVENT equations alongside blood pressure, cholesterol, diabetes and other factors. www.heart.org
This is one reason a cardiovascular assessment should not focus exclusively on the heart.
10. Body Mass Index and Waist Measurements
Body mass index (BMI) is a commonly used measure based on height and weight.
While BMI does not directly measure body-fat distribution, it can provide useful information about weight-related cardiovascular risk.
The AHA includes healthy weight among its Life’s Essential 8 cardiovascular health measures.
Waist circumference can also provide information about abdominal fat and metabolic health. It should be interpreted alongside other clinical measurements rather than used as a standalone predictor.
11. Your Overall Cardiovascular Risk Score
Perhaps the most important “number” isn’t a single laboratory result.
It may be your estimated cardiovascular risk over a specific period, calculated using multiple health factors.
The AHA’s PREVENT equations can estimate 10-year and, for younger adults, 30-year cardiovascular risk in adults ages 30–79 without known cardiovascular disease. The calculation incorporates factors including:
- Age
- Sex
- Blood pressure
- Total cholesterol
- HDL cholesterol
- Kidney function
- BMI
- Diabetes status
- Smoking status
- Blood-pressure medication use
- Cholesterol/triglyceride medication use
This illustrates an important principle:
Heart risk is a combination of factors—not a single number.
12. Coronary Artery Calcium Score
Not every important cardiovascular measurement comes from a blood test.
A coronary artery calcium (CAC) scan uses CT imaging to look for calcium-containing plaque in the coronary arteries.
It can be particularly useful when a healthcare professional and patient are uncertain about the potential benefits of starting cholesterol-lowering treatment. The 2026 ACC/AHA guideline supports selective use of CAC scoring to help reclassify cardiovascular risk.
CAC testing is not necessary for everyone and should be considered based on individual circumstances.
Why One “Good” Number Isn’t Enough
It is tempting to look at a single result and conclude:
“My cholesterol is normal, so my heart is healthy.”
But cardiovascular risk is more complicated.
A person can have a reasonable LDL-C level while having:
- High blood pressure
- Diabetes
- High Lp(a)
- Elevated triglycerides
- Kidney disease
- Smoking exposure
- Excess body weight
- A strong family history of premature cardiovascular disease
Conversely, an abnormal number does not automatically mean that someone will develop heart disease.
The goal is to understand how the different factors interact and identify which ones can be improved.
What Numbers Should You Discuss With Your Doctor?
Depending on your age, medical history and risk factors, it may be useful to discuss:
- Blood pressure
- LDL-C and non-HDL-C
- HDL-C and triglycerides
- Lp(a)
- ApoB, when appropriate
- Fasting glucose and/or HbA1c
- Kidney function
- BMI and waist measurements
- Overall cardiovascular risk estimate
- CAC score, when clinically appropriate
Not everyone needs every test. Your healthcare professional can determine which measurements are appropriate based on your personal risk profile.
How Can You Improve Your Numbers?
The encouraging news is that many cardiovascular risk factors can be modified.
The American Heart Association’s Life’s Essential 8 focuses on:
- Eating a heart-healthy diet
- Being physically active
- Avoiding tobacco and nicotine exposure
- Getting adequate sleep
- Maintaining a healthy weight
- Managing cholesterol
- Managing blood sugar
- Managing blood pressure
Some people may also need medication to manage cholesterol, blood pressure, diabetes or other conditions. Treatment decisions should be individualized with a healthcare professional.
Conclusion
Cholesterol matters but it is not the whole heart-health story.
Modern cardiovascular prevention increasingly looks at a broader collection of numbers and health factors, including blood pressure, blood sugar, kidney function, body weight, lipid measurements, Lp(a), ApoB and overall cardiovascular risk.
The 2026 approach to cardiovascular prevention emphasizes understanding a person’s total risk rather than relying on one isolated measurement.
Knowing your numbers is not about chasing a “perfect” result. It is about identifying risk early, understanding what those numbers mean together, and taking appropriate steps to protect cardiovascular health over the long term.