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Cardiac CT Calcium Scoring

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Cardiac CT Calcium Scoring, 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 42:1867-78 [PubMed]
  2. Pletcher (2004) Arch Intern Med 164:1285-92 [PubMed]