Table 5. Reference values of LV global strains measured with 2D and 3D CMR-TT.
| Variable | 2D CMR-TT | 3D CMR-TT | P value |
|---|---|---|---|
| Global mean strains (%) | |||
| Global radial mean strain (MRS) | 46.8±9.5 | 48.0±13.5 | 0.644 |
| Global circumferential mean strain (MCS) | −22.6±2.9 | −17.4±2.6 | <0.001* |
| Global longitudinal mean strain (MLS) | −20.8±2.2 | −16.1±2.3 | <0.001* |
| Global peak strains (%) | |||
| Global radial peak strain (GRS) | 41.7±9.5# | 44.4±13.0# | 0.094 |
| Global circumferential peak strain (GCS) | −22.0±3.3# | −17.0±2.7# | <0.001* |
| Global longitudinal peak strain (GLS) | −18.6±2.7# | −15.4±2.3# | <0.001* |
Results are reported as mean ± SD. *Adjusted P<0.05: 2D vs. 3D; #adjusted P<0.05: global peak strains vs. global mean strains. CMR-TT, cardiovascular magnetic resonance based tissue tracking.