Table 3. Reference mean values of left ventricle strain measures.
| Age distribution | Global longitudinal strain Mean GLS (CI) | Longitudinal strain - 4CH Mean LS (CI) | Global circumferential strain Mean GCS (CI) | Circumferential strain - Mid Mean CS (CI) | Global radial strain Mean GRS (CI) | Radial strain - Mid Mean RS (CI) |
|---|---|---|---|---|---|---|
| 0 - 1 | -18.7% (-20.8, -16.7) | -19.4% (-22.2, -16.6) | NA | -18.2% (-22.6, -13.7) | NA | 44.4% (36.6, 52.1) |
| 2 - 9 | -21.7% (-23.0, -20.5) | -21.0% (-21.8, -20.2) | -24.5% (-27.2, -21.7) | -20.3% (-21.4, -19.1) | 48.0% (33.3, 62.8) | 50.8% (47.4, 54.1) |
| 10 - 13 | -20.0% (-20.8, -19.1) | -20.5% (-21.7, -19.2) | -21.9% (-26.5, -17.4) | -21.5% (-23.1, -19.8) | 43.7% (33.0, 54.5) | 52.1% (48.5, 55.8) |
| 14 - 21 | -19.9% (-20.6, -19.2) | -19.9% (-21.2, -18.6) | -16.4% (-23.3, -9.6) | -19.7% (-22.1, -17.4) | 44.0% (41.6, 46.4) | 46.4% (39.7, 53.1) |
| Overall | -20.2% (-20.8, -19.6) | -20.4%(-21.1, -19.8) | -22.3% (-19.9, -24.6) | -21.4% (-20.6, -22.4) | 45.2% (38.8, 51.7) | 49.4% (47.2, 51.6) |
Data presented as mean (confidence interval)
CI, 95% confidence interval
GLS, Global longitudinal strain; LS, Longitudinal strain from the apical 4-chamber view
GCS, Global circumferential strain; CS, Circumferential strain at the mid-ventricular level (papillary muscle)
GRS, Global radial strain; RS, Radial strain at the mid-ventricular level (papillary muscle)