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Cardiac CT Calcium Scoring
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Cardiac CT Calcium Scoring
, Coronary Calcium Score, CT Coronary Calcium
Definition
CT-based quantification of coronary calcium deposits
Calcium deposits correlate with atherosclerotic
Plaque
Indications
CAD Risk stratification of asymptomatic patients
Intermediate risk patients who have not undergone stress testing
Intermediate risk patients with equivocal stress testing
Efficacy
Calcium scoring is an indepedent predictor of CAD event
Calcium score does not predict focal stenosis severity
Equipment
Electron beam tomography or
Multidetector CT
Interpretation
Calcium Score 0: Low risk
Calcium Score 1-100: CAD event
Relative Risk
= 2.1
Calcium Score 101-400: CAD event
Relative Risk
= 3.1
Threshold indicating further evaluation with stress testing
Calcium Score 401-1000: CAD event
Relative Risk
= 4.6
Calcium Score >1000: CAD event
Relative Risk
= 8.3
References
Budoff (2003) J Am Coll Cardiol 42:1867-78 [PubMed]
Pletcher (2004) Arch Intern Med 164:1285-92 [PubMed]
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