Table 5. CCTA and Rest CT Perfusion Findings in the 81 Subjects Undergoing Later SPECT-MPI.
| ACS (N = 13) | No ACS (N = 68) | P-Value* | |
|---|---|---|---|
| CCTA, N (%) | <0.001 | ||
| Non-obstructive CAD | 1 (7.7) | 48 (70.6) | |
| Obstructive CAD | 12 (92.3) | 20 (29.4) | |
| rCTP, N (%) | 0.050 | ||
| No defect | 6 (46.2) | 51 (75.0) | |
| Any Defect | 7 (53.8) | 17 (25.0) | |
| rCTP score, N (%) | 0.032 | ||
| Score = 0 | 6 (46.2) | 51 (75.0) | |
| Score = 1 | 4 (30.8) | 12 (17.7) | |
| Score = 2 | 2 (15.4) | 2 (2.9) | |
| Score = 3 | 1 (7.7) | 3 (4.4) | |
| SPECT-MPI: SSS, N (%) | <0.001 | ||
| 0-3 | 4 (30.8) | 61 (89.7) | |
| 4-8 | 2 (15.4) | 3 (4.4) | |
| 9-13 | 3 (23.1) | 3 (4.4) | |
| >13 | 4 (30.8) | 1 (1.5) | |
| SPECT-MPI: SDS, N (%) | <0.001 | ||
| 0 | 7 (53.9) | 65 (95.6) | |
| 1-3 | 2 (15.4) | 2 (2.9) | |
| 4-7 | 1 (7.7) | 0 (0.0) | |
| >8 | 3 (23.1) | 1 (1.5) |
rCTP perfusion defect were scored as normal or abnormal (1-3) with scores of 1 to 3 representing increasing reader confidence that an area of hypo-attenuation represented a true perfusion defect.
*
Comparisons between groups were performed with the use of Fisher's exact test or Wilcoxon Rank Sum test.
ACS= Acute Coronary Syndrome; CCTA=Coronary CT Angiography; rCTP=resting CT perfusion analysis; SPECT-MPI=Single-photon emission computed tomography-myocardial perfusion imaging; SSS=Summed Stress Score; SDS=Summed Difference Score.