Mean LVEF Using 4 Different Software Packages
| Mean LVEF ± SD (%) | Proposed reference range (mean LVEF ± 2 SDs [%]) | |||
|---|---|---|---|---|
| Software package (n = 62) | Stress | Rest | Stress | Rest |
| CardIQ Physio | 62 ± 6 | 54 ± 7 | 50–74 | 40–68 |
| ECTb | 71 ± 6 | 65 ± 6 | 59–83 | 53–77 |
| QGS | 56 ± 8 | 50 ± 8 | 40–72 | 34–66 |
| 4DM | 64 ± 7 | 56 ± 8 | 50–78 | 40–72 |
P < 0.01 for difference among all software packages, except CardIQ Physio and 4DM.