Background
Methods
Population
Data acquisition
Data analysis
Feature tracking
Left ventricular volumes and function
Statistical analysis
Results
Participant details
Feature tracking
Exam | p | |||
---|---|---|---|---|
A | B | C | ||
Segmental
| ||||
ErrSAX | 22.4 ± 9.6 | 19.2 ± 8.0 | 20.9 ± 9.0 | 0.04* |
EccSAX | −17.6 ± 8.1 | −16.6 ± 8.4 | −18.2 ± 8.9 | 0.06 |
ErrLAX | 16.2 ± 10.2 | 17.7 ± 10.3 | 17.9 ± 10.5 | 0.25 |
EllLV | −21.0 ± 11.0 | −20.0 ± 11.0 | −19.2 ± 12.8 | 0.23 |
EllRV | −23.7 ± 16.4 | −21.7 ± 13.5 | −20.6 ± 14.7 | 0.25 |
Global
| ||||
ErrSAX | 22.6 ± 7.9 | 19.4 ± 6.7 | 20.5 ± 5.2 | 0.40 |
EccSAX | −17.6 ± 5.0 | −16.6 ± 4.4 | −18.1 ± 4.3 | 0.81 |
ErrLAX | 16.2 ± 5.6 | 17.7 ± 5.6 | 17.9 ± 3.8 | 0.29 |
EllLV | −21.0 ± 5.1 | −20.0 ± 5.3 | −19.2 ± 5.3 | 0.06 |
EllRV | −23.8 ± 9.9 | −21.8 ± 5.7 | −19.1 ± 8.7 | 0.26 |
Inter-study reproducibility
Mean difference ± SD | Coefficient of Variation | ICC (95%CI) | Sample size | |
---|---|---|---|---|
Segmental
| ||||
ErrSAX | −3.5 ± 7.5% | 35.9% | 0.57 (0.35-0.71) | 48 |
EccSAX | 1.2 ± 6.5% | 38.0% | 0.68 (0.55-0.78) | 36 |
ErrLAX | 1.5 ± 9.2% | 53.2% | 0.62 (0.47-0.73) | 72 |
EllLV | −1.0 ± 11.3 | 55.4% | 0.59 (0.44-0.71) | 108 |
EllRV | −1.9 ± 13.6 | 60.0% | 0.56 (0.41-0.69) | 156 |
Global
| ||||
ErrSAX | −3.2 ± 5.7% | 27.2% | 0.61 (0.15-0.85) | 28 |
EccSAX | 1.0 ± 3.5% | 20.3% | 0.70 (0.32-0.89) | 11 |
ErrLAX | 1.5 ± 5.8% | 33.3% | 0.44 (0–0.77) | 29 |
EllLV | −1.08 ± 5.4% | 26.4% | 0.44 (0–0.77) | 25 |
EllRV | −1.9 ± 6.8% | 29.9% | 0.62 (0.20-0.85) | 39 |
Comparison of inter-study reproducibility AB with AC
LV volumes and function
Inter-study reproducibility
Exam | p | |||
---|---|---|---|---|
A | B | C | ||
LVEDV
| 161.7 ± 33.3 ml | 162.5 ± 37.0 ml | 161.2 ± 39.7 ml | 0.76 |
LVESV
| 67.5 ± 17.3 ml | 68.9 ± 20.0 ml | 64.9 ± 18.3 ml | 0.28 |
LVEF
| 58.5 ± 3.2% | 58.0 ± 4.3% | 59.6 ± 4.5% | 0.86 |
Mean difference ± SD | Coefficient of Variation | Intraclass correlation coefficient (95%CI) | |
---|---|---|---|
LVEDV
| −0.4 ± 6.9 ml | 4.2% | 0.98 (0.97-1.0) |
LVESV
| −0.8 ± 5.3 ml | 8.3% | 0.95 (0.88-0.98) |
LVEF
| 0.3 ± 2.6 ml | 4.6% | 0.75 (0.43-0.91) |