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Table 2 Comparison of circumferential myocardial strain percent shortening of all three ventricular slices in patients with and without LBBB, and healthy subjects.

From: Circumferential myocardial strain in cardiomyopathy with and without left bundle branch block

  

LBBB (%S)

Non-LBBB (%S)

Healthy (%S)

p(LBBB vs. non LBBB)*

p(LBBB vs. healthy)*

p(non-LBBB vs. healthy)*

Basal

AS

3 ± 2

6 ± 3

13 ± 4

0.005*

< 0.0001*

0.0009*

 

A

9 ± 4

8 ± 4

11 ± 5

0.624

0.285

0.115

 

AL

17 ± 3

15 ± 2

14 ± 3

0.121

0.066

0.502

 

IL

16 ± 6

11 ± 4

11 ± 3

0.046

0.027

0.683

 

I

9 ± 6

7 ± 3

8 ± 2

0.371

0.806

0.296

 

IS

4 ± 2

6 ± 4

8 ± 3

0.177

0.003*

0.191

Mid

AS

3 ± 2

9 ± 4

18 ± 2

0.001*

< 0.0001*

< 0.0001*

 

A

6 ± 4

10 ± 2

20 ± 3

0.009*

< 0.0001*

< 0.0001*

 

AL

17 ± 4

14 ± 2

20 ± 3

0.071

0.047

= 0.0004*

 

IL

16 ± 4

12 ± 4

24 ± 3

0.026

< 0.0001*

< 0.0001*

 

I

7 ± 3

7 ± 5

16 ± 4

0.823

< 0.0001*

0.0003*

 

IS

4 ± 3

7 ± 4

17 ± 3

0.036

< 0.0001*

< 0.0001*

Apical

AS

5 ± 4

9 ± 4

18 ± 3

0.012*

< 0.0001*

< 0.0001*

 

A

6 ± 5

12 ± 5

18 ± 4

0.007*

< 0.0001*

0.004*

 

AL

14 ± 4

14 ± 3

23 ± 5

0.891

0.0003*

0.0003*

 

IL

16 ± 4

13 ± 4

22 ± 7

0.096

0.022

0.002*

 

I

6 ± 3

7 ± 5

17 ± 3

0.565

< 0.0001*

< 0.0001*

 

IS

5 ± 4

8 ± 5

16 ± 2

0.095

< 0.0001*

0.0001*

  1. ± standard deviation. *with Bonferroni correction for multiple comparisons, p < 0.017 was considered significant. AS = anteroseptum. A = anterior wall. AL = anterolateral wall. IL = inferolateral wall. I = inferior wall. IS = inferoseptum.