II. Definition
- CT-based quantification of coronary calcium deposits
- Calcium deposits correlate with atherosclerotic Plaque
III. Indications
- CAD Risk stratification of asymptomatic patients
- Intermediate risk patients who have not undergone stress testing
- Intermediate risk patients with equivocal stress testing
IV. Efficacy
- Calcium scoring is an indepedent predictor of CAD event
- Calcium score does not predict focal stenosis severity
V. Equipment
- Electron beam tomography or
- Multidetector CT
VI. 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
