Arterial Age Calculator
Convert coronary calcium Agatston score and chronological age into estimated arterial age using MESA-based formula.
What Is Arterial Age?
Arterial age translates a coronary artery calcium (CAC) Agatston score into years, making atherosclerotic burden easier to understand. It is derived from the Multi-Ethnic Study of Atherosclerosis (MESA) and compares estimated vascular age to chronological age. For related cardiovascular tools, see the ABI Calculator and AA Gradient Calculator.
Arterial Age Formula
$$AA = 39.1 + 7.25 \times \ln(CAC + 1)$$
Where AA is arterial age in years and CAC is the Agatston calcium score from cardiac CT. Adding 1 before the logarithm allows a CAC of zero to be included in the calculation.
Understanding the Age Difference
The age difference (arterial age minus chronological age) shows whether arteries appear older or younger than expected. A positive difference suggests accelerated coronary atherosclerosis; a negative difference suggests lower-than-expected calcium burden for that age.
Frequently Asked Questions
How do I obtain a calcium score?
A coronary artery calcium score is measured by non-contrast cardiac CT. The result is reported as an Agatston score in arbitrary units.
What is a normal calcium score?
A CAC of zero indicates no detectable calcified plaque. Higher scores reflect greater plaque burden and higher cardiovascular risk.
What does a calcium score of 190 mean?
Using the MESA equation, a CAC of 190 corresponds to an estimated arterial age of about 77 years, regardless of chronological age.
Can arterial age diagnose heart disease?
No. Arterial age is a communication and risk-assessment aid. Clinical decisions require full cardiovascular evaluation including symptoms, risk factors, and other testing.
Should I use carotid intima-media thickness instead?
CIMT and CAC measure different aspects of vascular disease. This calculator uses CAC only; entering CIMT values will produce incorrect results.
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