Skip to main content
. 2015 Feb 27;16(2):251–285. doi: 10.3348/kjr.2015.16.2.251

Summary Table 4. Use of CT According to Different Test Results.

Appropriateness Criteria (Median Score) Level of Evidence Key References
Prior Exercise ECG
21 Prior normal exercise ECG, continued symptoms A (7) A (13, 14, 107, 110, 111, 113)
22 Prior exercise ECG results Duke Treadmill Score Low I (3) B (14, 107, 112, 114)
Intermediate A (7) B
High I (3) B
After Stress Imaging Procedures
23 Discordant exercise ECG and stress imaging results A (8) B (107, 110, 126)
24 Prior stress imaging results Equivocal A (8) B (112, 118, 125)
Mild A (7) B
Moderate or Severe I (3) B
Prior Coronary Calcium Scoring
25 Zero CAC > 5 y ago U (4) A (129)
26 Positive CAC > 2 y ago I (3) A (44, 139)
27 Diagnostic impact of CAC on the decision to perform coronary CT angiography in symptomatic patients CAC < 100 A (8) A (14, 16, 44, 139, 140)
CAC 100-400 A (8) A
CAC 401-1000 U (6) A
CAC > 1000 U (4) A
Asymptomatic or Stable Symptoms: Periodic Repeat Testing in the Setting of Prior Stress Imaging or Prior Coronary Angiography
28 No known CAD Last study < 2 y ago I (2) C NA
Last study ≥ 2 y ago I (3) C
29 Known CAD Last study < 2 y ago I (2) C NA
Last study ≥ 2 y ago I (3) C
Evaluation of New or Worsening Symptoms in the Setting of Past Stress Imaging Study
30 Evaluation of new or worsening symptoms Previous stress imaging: normal A (8) C NA
Previous stress imaging: abnormal U (6) C