Comparison of Gated SPECT Parameters
| Parameter | Control | Low TSS | High TSS | ANOVA P | P between each group |
|---|---|---|---|---|---|
| n | 16 | 16 | 18 | ||
| Heart rate (per minute) | 65 ± 7 | 68 ± 11 | 71 ± 8 | NS | |
| End-diastolic volume (mL) | 73 ± 19 | 55 ± 10 | 58 ± 18 | NS | |
| Ejection fraction (%) | 68 ± 9 | 73 ± 9 | 71 ± 12 | NS | |
| Ejection fraction < 55% | 0 (0%) | 0 (0%) | 2 (11%) | NS | |
| Diastolic parameters | |||||
| Peak filling rate (PFR) (per second) | 2.46 ± 0.45 | 2.76 ± 0.44 | 2.74 ± 0.53 | NS | |
| One-third mean filling rate (per second) | 1.52 ± 0.25 | 1.57 ± 0.31 | 1.25 ± 0.42 | 0.017 | L, H(0.03); C, H(0.08) |
| Time to PFR (ms) | 166 ± 22 | 168 ± 38 | 216 ± 82 | 0.015 | L, H(0.05); C, H(0.04) |
| Time to PFR/R-R interval | 0.18 ± 0.02 | 0.19 ± 0.04 | 0.26 ± 0.09 | 0.002 | L, H(0.01); C, H(0.005) |
NS = not statistically significant; L = low TSS; H = high TSS; C = control.