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Table 3 Inter-study reproducibility of LV Torsion and Torsion rates

From: Inter-study reproducibility of cardiovascular magnetic resonance tagging

LV parameter

Exam 1

Exam 2

Mean difference (SD)

ICC

SEM

SDC

Torsion °/cm

3.4

3.7

−0.3 (0.8)

0.73**

0.41

1.1

Time to peak Torsion (ms)

293.8

297.9

−4 (33.1)

0.77**

15.9

44.0

Peak systolic torsion rate ( °/s/cm)

16.1

18.2

−1.8 (6.2)

0.4 *

4.8

13.3

Peak diastolic torsion rate ( °/s/cm)

−17.2

−15.4

−1.8 (7.6)

0.37*

6.0

16.7

  1. SD standard deviation of mean difference, p <0.05 is statistically significant, ICC Intra-class correlation coefficient, SEM standard error of measurement, SDC Smallest detectable change. ** = p value <0.0001, * = p value <0.05.