Table 2.
Comparison of CMR-FT derived and hemodynamic parameters between rest and dobutamine stimulation.
| Level of dobutamine (μg kg−1 min−1) |
P value |
||||||
|---|---|---|---|---|---|---|---|
| Rest | 10 | 20 | Rest vs. 10 | Rest vs. 20 | 10 vs. 20 | ||
| Tom Tec | Global torsion (°/cm) | 2.7 (1.7) | 4 (2.1) | 4.6 (2.2) | <0.05 | <0.01 | 0.678 |
| TPK global torsion (ms) | 372 (113) | 260 (59) | 216 (27) | 0.13 | <0.01 | 0.05 | |
| Global Ecc (%) | −18.8 (2.9) | −26 (4.2) | −28.1 (3.3) | <0.01 | <0.01 | <0.05 | |
| TPK global Ecc (ms) | 337 (27) | 228 (47) | 179 (17) | <0.01 | <0.01 | <0.05 | |
| Global Err (%) | 31.9 (6.3) | 40.1 (9.7) | 45.6 (4.9) | 0.13 | <0.01 | <0.05 | |
| TPK global Err (ms) | 327 (26) | 231 (44) | 179 (19) | <0.01 | <0.01 | 0.125 | |
| Circle | Global torsion (°/cm) | 1.8 (0.9) | 3.6 (1.9) | 3.6 (1.7) | <0.05 | <0.05 | 0.515 |
| TPK global torsion (ms) | 360 (75) | 237 (50) | 202 (52) | <0.01 | <0.01 | <0.05 | |
| Global Ecc (%) | −16 (2.7) | −20.7 (2.1) | −21.5 (2.5) | <0.01 | <0.01 | 0.374 | |
| TPK global Ecc (ms) | 345 (51) | 226 (54) | 184 (31) | <0.01 | <0.01 | 0.051 | |
| Global Err (%) | 27.6 (6.4) | 45.2 (7.1) | 49.3 (9) | <0.01 | <0.01 | 0.139 | |
| TPK global Err (ms) | 345 (52) | 229 (52) | 187 (30) | <0.01 | <0.01 | 0.051 | |
| LV-EDV (ml/m2) | 51.0 (7.5) | 52.7 (9.1) | 43.8 (15.4) | 0.33 | <0.05 | <0.01 | |
| LV-ESV (ml/m2) | 21.7 (5.1) | 14.4 (5.9) | 11.4 (4.6) | <0.01 | <0.01 | <0.01 | |
| LV-SV (ml/m2) | 29.4 (4.1) | 38.3 (7.4) | 37.3 (6.5) | <0.01 | <0.01 | 0.24 | |
| LV-EF (%) | 57.9 (5.6) | 72.9 (9.5) | 77.0 (5.7) | <0.01 | <0.01 | <0.05 | |
| Mean BP (mmHg) | 92 (10) | 99 (10) | 103 (11) | <0.01 | <0.05 | <0.05 | |
| Heart rate | 69 (10) | 85 (17) | 113 (12) | <0.01 | <0.01 | <0.01 | |