coronary artery calcium score
A CT-based measurement of calcium deposits in coronary arteries used to assess atherosclerotic burden and cardiovascular risk.
Full Definition
The coronary artery calcium (CAC) score is a non-invasive imaging biomarker that quantifies calcified atherosclerotic plaque in the coronary arteries using computed tomography. Expressed in Agatston units, the score ranges from zero (no detectable calcium) to over 1000 (extensive calcification). CAC scoring is particularly valuable in intermediate-risk patients for cardiovascular risk stratification, with scores of 0-10 indicating minimal risk, 11-100 mild risk, 101-400 moderate risk, and >400 severe risk. The test requires no contrast and low radiation exposure, making it suitable for screening asymptomatic individuals. CAC scores inform decisions about preventive therapies including statins and aspirin in primary prevention.
Usage
Usage note: Hyphenate the full term; CAC is acceptable abbreviation after first use.
In Context
- "The coronary artery calcium score of 245 placed the patient in a moderate cardiovascular risk category." — Cardiac CT report
- "CAC scoring was recommended for further risk stratification in this 55-year-old asymptomatic diabetic patient." — Preventive cardiology consultation