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Table 6 Intra- and inter-observer reproducibility for RV strain and strain rate measurements derived by fast and conventional feature tracking approaches

From: Cardiovascular magnetic resonance‐assessed fast global longitudinal strain parameters add diagnostic and prognostic insights in right ventricular volume and pressure loading disease conditions

Method

RV strain /strain rate

Intra-observer (n = 30)

Inter-observer (n = 30)

Bias (limits of agreement)

CV (%)

Bias (limits of agreement)

CV (%)

Fast strain approach

Fast GLS, %

− 0.1 (− 1.6, 1.4)

2.9

− 0.3 (− 2.3, 1.8)

3.9

Fast GLSRs, 1/s

− 0.04 (− 0.20, 0.12)

6.3

− 0.03 (− 0.22, 0.17)

7.0

Fast GLSRe, 1/s

− 0.02 (− 0.23, 0.20)

6.5

− 0.03 (− 0.30, 0.23)

8.1

Fast GLSRa, 1/s

− 0.03 (− 0.21, 0.15)

7.5

− 0.03 (− 0.27, 0.20)

9.6

Feature tracking approach

GLS, %

− 0.2 (− 4.3, 3.9)

6.0

− 0.1 (− 5.3, 5.1)

7.5

GLSRs, 1/s

− 0.02 (− 0.33, 0.29)

9.3

− 0.02 (− 0.36, 0.32)

10.1

GLSRe, 1/s

0.10 (− 0.23, 0.43)

12.1

0.04 (− 0.40, 0.47)

13.3

GLSRa, 1/s

− 0.06 (− 0.37, 0.25)

12.9

− 0.04 (− 0.40, 0.32)

14.4

  1. CV coefficient of variation, GLS global longitudinal strain, GLSRs peak global longitudinal strain rate during systole, GLSRe peak global longitudinal strain rate during early diastole, GLSRa peak global longitudinal strain rate during late diastole, RV right ventricular