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Cardiac CT Calcium ScoringAka: Coronary Calcium Score, CT Coronary Calcium

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

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This page was written by Scott Moses, MD. This page was last revised before 5/10/08, prior to consistent tracking of revision date. This page was last published on 2/26/2010. Please send comments and questions to the editor. Contact information may be found on the page About the Family Practice Notebook. These pages are best viewed with Microsoft Internet Explorer 6.0.