Reference mean values of left ventricle strain measures by vendor.
| 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) |
|---|---|---|---|---|---|---|
| General Electric (GE) | ||||||
| 0 - 1 | -19.7% (-21.3, -18.2) | -20.7% (-23.7, -17.8) | NA | -20.1% (-23.2, -17.1) | NA | 46.3% (35.0, 57.6) |
| 2 - 9 | -22.9% (-23.9 -22.0) | -21.5% (-22.3, -20.6) | -22.5% (-24.8, -20.1) | -20.3% (-21.6, -19.0) | 54.5% (51.4.3,57.6) | 47.3% (39.0, 55.5) |
| 10 - 13 | -19.8% (-21.0, -18.7) | -20.5% (-21.9, -19.0) | -21.9% (-26.5, -17.4) | -21.8% (-23.3, -20.4) | 43.7% (33.0, 54.5) | 52.4% (48.8, 56.0) |
| 14 - 21 | -19.7% (-20.5, -18.9) | -19.9% (-21.2, -18.6) | -16.4% (-23.3, -9.6) | -19.9% (-23.0, -16.8) | 44.0% (41.6, 46.4) | 47.9% (41.5, 54.2) |
| Overall | -20.3% (-21.1, -19.4) | -20.,% (-21.4, -20.2) | -20.9% (-23.3, -18.5) | -20.6% (-21.6, -19.7) | 45.4% (38.8, 52.0) | 48.5% (45.0, 51.9) |
| Philips | ||||||
| 0 - 1 | NA | -NA | NA | NA | NA | NA |
| 2 - 9 | -20.1% (-20.7, -19.6) | -20.5% (-26.2, -14.8) | -22.4% (-23.2, -21.6) | NA | 34.6% (32.7, 36.5) | NA |
| 10 - 13 | -20.6% (-21.1, -20.1) | NA | NA | -19.0% (-19.6, -18.4) | NA | 29.5% (28.1, 31.0) |
| 14 - 21 | -20.8 %(-21.4, -20.2) | NA | NA | -18.0% (-20.2, -15.9) | NA | 35.9% (21.3, 50.5) |
| Overall | -20.5% (-20.8, -20.1) | NA | NA | -18.4% (-19.7, -17.1) | NA | 32.2% (28.2, 36.3) |
| Siemens | ||||||
| 0 - 1 | NA | -18.2 (-20.9, -16.0) | NA | -18.2% (-22.6, -13.7) | NA | 44.4% (36.6, 52.1) |
| 2 - 9 | NA | -18.5 (-19.8, -17.3) | -13.4%(-16.2, -10.4) | -20.3% (-21.4, -19.1) | NA | 50.8% (47.4,54.1) |
| 10 - 13 | NA | -20.4 (-22.2, -18.7) | NA | -21.5% (-23.1, -19.8) | NA | 52.1% (48.5,55.8) |
| 14 - 21 | NA | NA | NA | -19.7% (-22.1, -17.4) | NA | 46.4% (39.7,53.1) |
| Overall | NA | -19.1% (-20.5, -17.8) | NA | -21.4% (-20.6, -22.4) | NA | 49.4% (47.2,51.6) |
| Esaote | ||||||
| 0 - 1 | -16.7% (-17.3, -11.2) | -15.1% (-15.8, -14.5) | NA | -14.2% (-15.1, -13.3) | NA | NA |
| 2 - 9 | NA | -22.2% (-23.7, -20.6) | -25.6% (-29.1, -22.1) | -24.0% (-27.0, -21.0) | NA | NA |
| 10 - 13 | NA | -NA | NA | NA | NA | NA |
| 14 - 21 | NA | -NA | NA | NA | NA | NA |
| Overall | NA | -18.6% (-25.5, -11.7) | NA | -19.0% (-28.6, -9.4) | NA | NA |
Data presented as mean (confidence interval); NA, not applicable (no studies in this age range)
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)