Rest and Dipyridamole Stress 82Rb PET in Patients With and Without Ischemic ECG Changes
| Parameter | Ischemic ECG (n = 72) | Nonischemic ECG (n = 557) | P value |
|---|---|---|---|
| Resting heart rate (bpm) | 73 ± 13 | 66 ± 11 | <0.001 |
| Resting blood pressure (mm Hg) | |||
| Systolic | 147 ± 20 | 140 ± 22 | 0.01 |
| Diastolic | 79 ± 11 | 76 ± 13 | 0.01 |
| Peak stress heart rate (bpm) | 99 ± 16 | 85 ± 14 | <0.001 |
| Peak stress blood pressure (mm Hg) | |||
| Systolic | 150 ± 24 | 138 ± 22 | <0.001 |
| Diastolic | 78 ± 20 | 73 ± 14 | NS |
| Rate · pressure product | |||
| Rest | 10,717 ± 2,545 | 9,278 ± 2,246 | <0.001 |
| Stress | 14,916 ± 3,564 | 11,722 ± 2,774 | <0.001 |
| Persantine-induced chest pain* | 39 (54) | 230 (41) | <0.05 |
| Stress ECG | |||
| ST depression* | 72 (100) | 0 | <0.001 |
| Leads with ST depression | 3.6 ± 1.9 | 0 | <0.001 |
| Maximum ST depression (mm) | 1.3 ± 0.4 | 0 | <0.001 |
| MPI | |||
| SSS | 0.15 ± 0.53 | 0.19 ± 0.49 | NS |
| SRS | 0.32 ± 0.73 | 0.7 ± 1.58 | <0.03 |
| SDS | 0.10 ± 0.31 | 0.07 ± 0.23 | NS |
↵* Values in parentheses are percentages.
bpm = beats per minute; NS = not significant.