Table 1 Patient demographics and characteristics. Group 1 had normal perfusion and function. Group 2 had abnormal perfusion and/or function.
All Patients N = 407 | Group 1 N = 169 | Group 2 N = 238 | P value * | |
|---|---|---|---|---|
Age (years) | 65 ± 12 | 63 ± 13 | 66 ± 11 | 0.06 |
Male (percent) | 213 (52%) | 69 (41%) | 144 (60%) | <0.0001 |
Height (cm) | 168 ± 10 | 166 ± 9 | 170 ± 10 | 0.005 |
Weight (kg) | 83.6 ± 16.9 | 81.4 ± 16.7 | 85.2 ± 17.0 | 0.03 |
Scan protocol (percent) | ||||
Two-Day | 351 (84%) | 148 (88%) | 202 (85%) | >0.2 |
Same-Day | 56 (14%) | 21 (12%) | 35 (15%) | |
Stress method (percent) | ||||
Exercise only | 173 (43%) | 100 (59%) | 73 (31%) | <0.0001 |
Dipyridamole | 234 (57%) | 69 (41%) | 165 (69%) | |
Heart rate (BPM) | ||||
Stress scan | 70 ± 12 | 71 ± 13 | 70 ± 13 | 0.15 |
Rest scan | 64 ± 12 | 64 ± 11 | 64 ± 13 | >.2 |
Change | 6 ± 9 | 8 ± 10 | 5 ± 9 | 0.005 |
Perfusion | ||||
SSS | 7 ± 8 | 1 ± 1 | 11 ± 8 | <0.0001 |
SRS | 3 ± 6 | 0 ± 0 | 5 ± 7 | <0.0001 |
SDS | 4 ± 4 | 1 ± 1 | 6 ± 5 | <0.0001 |
LVEF (%) | 57 ± 14 | 64 ± 9 | 52 ± 15 | <0.0001 |
TID Ratio | 1.04 ± 0.12 | 1.01 ± 0.12 | 1.06 ± 0.12 | 0.0001 |