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Table 4 Comparison of peak strain and characteristics of strain-volume loops between MidLateral and MidSeptal

From: The value of left ventricular strain–volume loops in predicting response to cardiac resynchronization therapy

Variable

Controls (n = 20)

Baseline

Follow-up

Responders (n = 27)

Non-Responders (n = 13)

Responders (n = 27)

Non-Responders (n = 13)

MidLateral

MidSeptal

P

MidLateral

MidSeptal

P

MidLateral

MidSeptal

P

MidLateral

MidSeptal

P

MidLateral

MidSeptal

P

Segmental PSPeak

−38.6 ± 11.5

−51.6 ± 10.1

.000

−17.1 ± 7

−13 ± 8.8

.077

−10.1 ± 5.7

−11.6 ± 6.5

.392

−20.8 ± 6.6

−22 ± 11

.621

−13.2 ± 5.8

−12.4 ± 7.8

.701

Characteristics of strain-volume loops

 Segmental PS-Global volume loop

  slope

1.06 ± 0.4

1.46 ± 0.57

.002

0.38 ± 0.17

0.2 ± 0.2

.002

0.19 ± 0.12

0.18 ± 0.3

.887

0.45 ± 0.22

0.48 ± 0.34

.469

0.23 ± 0.11

0.21 ± 0.18

.646

  R2-S/D coupling

0.91 ± 0.08

0.93 ± 0.04

.373

0.84 ± 0.22

0.44 ± 0.39

.000

0.69 ± 0.34

0.73 ± 0.26

.721

0.85 ± 0.15

0.71 ± 0.29

.025

0.83 ± 0.25

0.66 ± 0.34

.203

 Segmental PS-Segmental volume loop

  slope

18.66 ± 7.41

28.26 ± 10.34

.000

4.39 ± 1.78

6.67 ± 3.44

.000

2.82 ± 1.44

4.85 ± 1.93

.000

6.13 ± 2.94

10.8 ± 7.22

.001

3.21 ± 1.52

4.83 ± 2.83

.040

  R2-S/D coupling

0.97 ± 0.04

0.96 ± 0.06

.446

0.95 ± 0.09

0.89 ± 0.12

.078

0.89 ± 0.15

0.94 ± 0.06

.241

0.95 ± 0.08

0.93 ± 0.13

.512

0.89 ± 0.18

0.81 ± 0.33

.520

  1. PS Principal strain
  2. Data are expressed as mean ± SD