ASCVD (atherosclerotic cardiovascular disease) is the 10-year risk of atherosclerotic cardiovascular events: myocardial infarction, coronary death and stroke. It is calculated with the Pooled Cohort Equations that underpin the ACC/AHA guidelines.
The metric turns a set of risk factors into a single number — the probability of an event in percent — and helps decide who needs statins and how aggressively to lower LDL.
How to read the result
A risk below 5% is considered low, 5–7.5% borderline, 7.5–20% intermediate, and 20% or higher high. The threshold for discussing statins is ≥7.5%: from that point the benefit of lowering cholesterol usually outweighs the risks of therapy.
In the intermediate zone the decision is refined using "risk-enhancing factors" (family history, persistently high LDL, hs-CRP ≥2 mg/L, metabolic syndrome, chronic kidney disease) and by the coronary artery calcium score (CAC).
Limitations of the scale
The Pooled Cohort Equations were developed on a US population and for ages 40–75; in other ethnicities and at the edges of the range they may over- or underestimate risk. The scale does not apply to established cardiovascular disease, familial hypercholesterolemia or LDL ≥190 mg/dL — these patients are prescribed statins without a calculation.
The newer AHA PREVENT equations (2023) add kidney function and metabolic factors and are gradually replacing the earlier model.
What to do with high risk
A high ASCVD is not cause for panic but for systematic work: quitting smoking, a Mediterranean dietary pattern, physical activity, blood-pressure control and, when indicated, statins. Lowering LDL by every 1 mmol/L reduces the risk of major vascular events by about a fifth.
Reference ranges
The 10-year ASCVD risk is calculated with the Pooled Cohort Equations (sex, age, race, total cholesterol, HDL, systolic blood pressure, smoking, diabetes). Risk categories:
| Low risk | under 5% |
| Borderline | 5 – 7.5% |
| Intermediate | 7.5 – 20% |
| High | 20% and above |
| Statin threshold | ≥ 7.5% |
What an elevated level means
A high calculated risk (≥20%) means that, at your current lifestyle and values, the probability of a heart attack or stroke over 10 years is one in five or higher. This is an indication for high-intensity statin therapy and active correction of risk factors.
What a low level means
A risk below 5% is low: aggressive drug prophylaxis is usually not needed — lifestyle and a scheduled recalculation every 4–6 years are enough. A low number does not remove the benefit of quitting smoking and controlling blood pressure.
How the test is done
The calculation is automatic: sex, age, race, total cholesterol, HDL, systolic blood pressure (and whether it is treated), smoking and diabetes are entered into the Pooled Cohort Equations formula. Blood for lipids is drawn after a 9–12 hour fast.
What affects the value
- Taking statins already lowers cholesterol — the "raw" risk before treatment is higher than the risk calculated on therapy.
- Acute inflammation or infection temporarily changes lipids and blood pressure.
- Incorrectly entered race or ethnicity shifts the result noticeably.
- A single high blood-pressure reading at the visit ("white-coat effect") overstates the risk.
Calculate using this marker
Calculators where ASCVD (Atherosclerotic cardiovascular disease) is used directly:
Frequently asked questions
Is an ASCVD of 10% a lot?
It is intermediate risk: roughly one in ten such combinations of factors ends in a heart attack or stroke within 10 years. Statins are usually discussed and the decision refined by additional factors and the coronary calcium score.
Can I lower my ASCVD?
Yes. Some parameters are modifiable: quitting smoking, lowering blood pressure and LDL, and treating diabetes reduce the calculated risk. Age and sex cannot be changed, so in older people the number stays high even with an ideal lifestyle.