Estimate your 10-year and 30-year risk of a heart attack (myocardial infarction) and stroke using the validated CHD and stroke sub-models from the 2023 AHA PREVENT equations.
AHA PREVENT CHD model · Ages 30–79 · For adults without known CVD
This calculator estimates your coronary heart disease (CHD) risk — the closest published validated estimate of heart attack probability using the CHD sub-model from the 2023 AHA PREVENT equations (Khan SS et al., Circulation 2024;149:430–449). CHD is defined as nonfatal myocardial infarction (heart attack) plus fatal coronary heart disease events.
Unlike the basic ASCVD calculator which groups heart attack and stroke together, this page separates them — showing your CHD risk (heart attack) and stroke risk independently, alongside the combined ASCVD figure, for both 10-year and 30-year horizons.
Uses the published PREVENT CHD model (nonfatal MI + fatal CHD) — not a generic CVD risk divided by an arbitrary fraction.
Heart attack and stroke have different risk factor profiles. Showing them separately helps target the right intervention.
Family history isn't in the PREVENT equation but is a guideline-recognized risk enhancer flagged prominently in your results.
Enter your values from a recent physical exam and blood test. This tool requires eGFR (kidney function) in addition to the standard cholesterol and blood pressure inputs, because eGFR is part of the validated PREVENT equations. If you don't have your eGFR, a value of 90 represents normal kidney function for most healthy adults.
The family history question asks about a first-degree relative (parent, sibling, or child) who had a heart attack before age 55 if male or before age 65 if female. This is not part of the PREVENT equation, but is a clinically important risk-enhancing factor under 2019 ACC/AHA guidelines — your results will flag it with a note for your doctor discussion.
These three terms are often confused. Here is how they nest inside each other:
Smoking and cholesterol drive CHD risk more strongly than stroke. High blood pressure drives stroke risk more strongly than CHD. This is why showing them separately as this calculator does gives a more actionable picture than a single blended number.
Using the PREVENT CHD model, a 10-year risk below 5% is low, 5–7.5% is borderline, 7.5–20% is intermediate, and 20%+ is high. These thresholds parallel the ASCVD categories used in clinical guidelines. Intermediate and high risk typically prompts a discussion about statin therapy and aggressive lifestyle modification.
Yes — significantly. The 2019 ACC/AHA guidelines list premature ASCVD in a first-degree relative (male <55, female <65) as a risk-enhancing factor that should be weighted alongside your calculated score. If your score is in the borderline range (5–7.5%) and you have a family history, this is the kind of case where a coronary artery calcium (CAC) score test may be recommended to help make the treatment decision.
CHD (coronary heart disease) covers heart attacks only — nonfatal MI and fatal coronary events. ASCVD adds stroke to CHD. Because blood pressure is a stronger driver of stroke than heart attack, two people with the same total ASCVD risk can have very different CHD-to-stroke splits based on their blood pressure profile.
eGFR (estimated glomerular filtration rate, a kidney function measure) is a required input in all 2023 AHA PREVENT equations, including the CHD model. Reduced kidney function is an independent risk factor for coronary events, independent of cholesterol or blood pressure. If you don't know your eGFR, ask your doctor or enter 90 (the normal reference value) as a placeholder but get it tested, as it matters.