Risk Stratification CAC score Plaque burden Probability of CAD Cardiac event risk Management 0NoVery unlikely <1% 10 yr risk <2% <0.11% annually Reassure Repeat scan 5 yrs 0-80SmallLow0.2% annuallyRisk factors modification Repeat scan 2-5 yrs 81-400ModeratePossible1% annually(2° prevention) ± EST ASA, statin >400extensiveHigh likelihood Up to 4.8% annually (2° prevention) ASA, statin