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Table 1 Intraobserver and Interobserver reproducibility of LV strain and torsion

From: Inter-study reproducibility of cardiovascular magnetic resonance tagging

 

Slice

Intraobserver ICC

Interobserver ICC

Ecc

Base

0.8**

0.8**

 

Mid

0.77**

0.7 **

 

Apex

0.8**

0.8 *

Err

Base

0.9**

0.9 **

 

Mid

0.9**

0.8 **

 

Apex

0.5**

0.7 **

Lambda 1

Base

0.8**

0.8 **

 

Mid

0.8**

0.6 **

 

Apex

0.6**

0.7 **

Lambda 2

Base

0.9**

0.8 **

 

Mid

0.7**

0.7 **

 

Apex

0.8**

0.8 **

Angle

Base

0.7**

0.7 **

 

Mid

0.7**

0.5 **

 

Apex

0.5*

0.5 *

Time to peak Ecc

Mid

0.5*

0.3 *

Systolic circumferential strain rate

Mid

−0.1

0.4*

Early diastolic circumferential strain rate

Mid

0.5*

0.2

Torsion

-

0.9**

0.9 **

Time to peak torsion

-

0.9**

0.5 *

Peak systolic torsion rate

-

0.4*

0.6 *

Peak diastolic torsion rate

-

0.8**

0.7 **

  1. Ecc Circumferential strain, Err Radial strain.
  2. ICC = Intraclass correlation coefficient.
  3. ** = p <0.0001.
  4. * = p <0.05.