Myocardial Perfusion SPECT Results According to Collateral Group
| Characteristic | Group I (n = 25) | Group II (n = 31) | P |
|---|---|---|---|
| Ischemic clinical response | 6 (24) | 7 (22.5) | NS |
| Ischemic ECG response | 12 (48) | 11 (35) | NS |
| SSS ≥ 4 (abnormal) | 25 (100) | 29 (93.5) | NS |
| SSS | 14.6 ± 6.9 | 13.7 ± 7.4 | NS |
| SRS | 1.1 ± 2.6 | 1.0 ± 2.8 | NS |
| SDS | 13.4 ± 5.7 | 12.7 ± 7.7 | NS |
| NRS | 0.5 ± 1.1 | 0.4 ± 1.1 | NS |
| RS | 5.3 ± 2.2 | 4.8 ± 2.6 | NS |
NS = not significant; NRS = number of nonreversible segments; RS = number of reversible segments.
Data are number of patients, with percentage in parentheses, or mean ± SD.