Background
Methods
Cardiovascular magnetic resonance
Ventricular volumes and function
Feature tracking
Comparison with natural radial strain
Statistics
Results
Demographics | "Normal" Healthy Volunteers |
---|---|
Study population | N = 10 |
Gender | Male 50%, Female 50% |
Age (y) | 40.6 (23.9-51.8) |
RV-EDV (ml/m2) | 76.6 ± 14.3 |
RV-ESV(ml/m2) | 32.1 ± 8.6 |
RV-CI (l/min/m2) | 3.0 ± 0.6 |
RV-EF (%) | 58.5 ± 4.1 |
EllRV | -19.7 ± 14.1 |
LV-EDV (ml/m2) | 76.9 ± 12.5 |
LV-ESV (ml/m2) | 33.4 ± 7.5 |
LV-CI (l/min/m2) | 3.0 ± 0.6 |
LV-EF (%) | 56.9 ± 4.4 |
EllLV | -15.9 ± 10.5 |
ErrLAX | 15.3 ± 10.1 |
ErrSAX | 19.6 ± 14.6 |
EccSAX | -24.1 ± 6.7 |
Strain parameters at rest
Dobutamine stress cardiovascular magnetic resonance
Parameter | Level of Dobutamine (μg/kg-1/min-1) | Significance: Paired t-test | ||||
---|---|---|---|---|---|---|
Rest | 10 | 20 | Rest-10 | Rest-20 | 10-20 | |
Heart Rate (bpm)
| 68.6 ± 11.9 | 87.1 ± 15.5 | 115.7 ± 11.1 | <0.05 | <0.05 | <0.05 |
Mean BP (mmHg)
| 91.5 ± 10.2 | 98.6 ± 10.4 | 102.9 ± 10.7 | <0.05 | <0.05 | <0.05 |
LV-CI (l/min/m
2
)
| 3.0 ± 0.6 | 4.8 ± 0.8 | 5.7 ± 0.8 | <0.05 | <0.05 | <0.05 |
RV-CI (l/min/m
2
)
| 3.0 ± 0.6 | 4.7 ± 0.8 | 5.8 ± 4.0 | <0.05 | <0.05 | <0.05 |
LV-EDV (ml/m
2
)
| 76.9 ± 12.5 | 75.0 ± 12.5 | 64.5 ± 11.5 | 0.25 | <0.05 | <0.05 |
LV-ESV (ml/m
2
)
| 33.4 ± 7.5 | 22.1 ± 7.3 | 15.2 ± 5.0 | <0.05 | <0.05 | <0.05 |
LV-SV (ml/m
2
)
| 43.5 ± 6.5 | 52.9 ± 10.6 | 49.3 ± 8.0 | <0.05 | <0.05 | 0.06 |
LV-EF (%)
| 56.9 ± 4.4 | 70.7 ± 8.1 | 76.8 ± 4.6 | <0.05 | <0.05 | <0.05 |
Err
SAX
| 19.6 ± 14.6 | 31.8 ± 20.9 | 42.4 ± 25.5 | <0.05 | <0.05 | <0.05 |
Ecc
SAX
| -24.1 ± 6.7 | -32.7 ± 11.4 | -39.2 ± 15.2 | <0.05 | <0.05 | <0.05 |
Parameter | Level of Dobutamine (μg/kg-1/min-1) | Significance: Paired t-test | ||||
---|---|---|---|---|---|---|
Rest | 10 | 20 | Rest-10 | Rest-20 | 10-20 | |
Err
SAX
Average
| 19.6 ± 14.6 | 31.8 ± 20.9 | 42.4 ± 25.5 | <0.05 | <0.05 | <0.05 |
Err
SAX
Segment 7
| 27.3 ± 16 | 33.1 ± 20 | 50.2 ± 29 | 0.4 | <0.05 | 0.1 |
Err
SAX
Segment 8
| 13 ± 9.5 | 22.6 ± 11.5 | 28.2 ± 15.2 | <0.05 | <0.05 | 0.2 |
Err
SAX
Segment 9
| 11.1 ± 9.9 | 17.6 ± 13.4 | 22 ± 17 | 0.08 | <0.05 | 0.3 |
Err
SAX
Segment 10
| 16.8 ± 12 | 31.7 ± 20.3 | 37.2 ± 19.2 | <0.05 | <0.05 | 0.22 |
Err
SAX
Segment 11
| 21.6 ± 15.9 | 42.7 ± 20 | 55.8 ± 19.1 | <0.05 | <0.05 | <0.05 |
Err
SAX
Segment 12
| 27.7 ± 16.1 | 43.4 ± 26.6 | 60.7 ± 28.1 | 0.1 | <0.05 | 0.18 |
Ecc
SAX
Average
| -24.1 ± 6.7 | -32.7 ± 11.4 | -39.2 ± 15.2 | <0.05 | <0.05 | <0.05 |
Ecc
SAX
Segment 7
| -21.7 ± 6.9 | -24.2 ± 6.3 | -28.9 ± 16 | 0.29 | 0.2 | 0.2 |
Ecc
SAX
Segment 8
| -20.2 ± 8.2 | -25.9 ± 12.4 | -33.9 ± 18 | 0.06 | <0.05 | 0.09 |
Ecc
SAX
Segment 9
| -22.8 ± 6.9 | -35.7 ± 9 | -42.1 ± 9.8 | <0.05 | <0.05 | 0.1 |
Ecc
SAX
Segment 10
| -26.7 ± 5.5 | -36.6 ± 8.8 | -38.8 ± 16.3 | 0.09 | 0.06 | 0.55 |
Ecc
SAX
Segment 11
| -29.1 ± 4.7 | -38.1 ± 13.2 | -47 ± 9.5 | <0.05 | <0.05 | 0.09 |
Ecc
SAX
Segment 12
| -23.8 ± 4.3 | -35.9 ± 10.9 | -44.2 ± 14.9 | 0.09 | <0.05 | 0.06 |
Intra- and inter-observer variability
Parameter | Ventricle | Variability | Mean | CI (95%) | p-value |
---|---|---|---|---|---|
Ecc
SAX
| LV | Intra-observer | 24.1 | 22.3-25.8 | 0.06 |
22.7 | 20.8-24.6 | ||||
Inter-observer | 24.1 | 22.3-25.8 | 0.61 | ||
24.6 | 22.6-26.6 | ||||
Err
SAX
| LV | Intra-observer | 19.6 | 15.8-23.4 | 0.86 |
19.9 | 16.5-23.2 | ||||
Inter-observer | 19.6 | 15.8-23.4 | 0.06 | ||
25.4 | 22.3-28.4 | ||||
Err
LAX
| LV | Intra-observer | 15.3 | 12.7-18 | 1 |
15.3 | 13-17.7 | ||||
Inter-observer | 15.3 | 12.7-18 | 0.32 | ||
16.6 | 14.4-18.7 | ||||
Ell
LV
| LV | Intra-observer | 15.9 | 13.2-18.6 | 0.57 |
15.2 | 12.4-18.1 | ||||
Inter-observer | 15.9 | 13.2-18.6 | 0.82 | ||
16.2 | 13.2-19.1 | ||||
Ell
RV
| RV | Intra-observer | 19.6 | 16-23.3 | 0.13 |
16.8 | 13.4-20.1 | ||||
Inter-observer | 19.6 | 16-23.3 | 0.32 | ||
21.4 | 17.8-25 |
Parameter | Ventricle | Variability | Mean | CI (95%) | p-value |
---|---|---|---|---|---|
Ecc
SAX
| LV | Intra-observer | 24.1 | 22.3-25.8 | 0.06 |
22.7 | 20.8-24.6 | ||||
Inter-observer | 24.1 | 22.3-25.8 | 0.61 | ||
24.6 | 22.6-26.6 | ||||
Ecc
SAX10
| LV | Intra-observer | 32.7 | 29.8-35.8 | 0.09 |
31.1 | 28.3-34.9 | ||||
Inter-observer | 32.7 | 29.8-35.8 | 0.66 | ||
33.4 | 29.9-37 | ||||
Ecc
SAX20
| LV | Intra-observer | 39.2 | 35.2-43.1 | 0.25 |
41 | 37.9-43.9 | ||||
Inter-observer | 39.2 | 35.2-43.1 | 0.17 | ||
41.2 | 37.8-44.6 | ||||
Err
SAX
| LV | Intra-observer | 19.6 | 15.8-23.4 | 0.86 |
19.9 | 16.5-23.2 | ||||
Inter-observer | 19.6 | 15.8-23.4 | 0.06 | ||
25.4 | 22.3-28.4 | ||||
Err
SAX10
| LV | Intra-observer | 31.8 | 26.9-37.9 | 0.2 |
34.9 | 29.9-39.8 | ||||
Inter-observer | 31.8 | 26.9-37.9 | 0.14 | ||
35.5 | 30.7-40.3 | ||||
Err
SAX20
| LV | Intra-observer | 42.4 | 35.8-48.9 | 0.31 |
44.9 | 36.2-49.1 | ||||
Inter-observer | 42.4 | 35.8-48.9 | 0.59 | ||
43.5 | 38.4-48.5 |