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Table 2 CMRI strain parameters between the patients with and without an Impella

From: Protective effect of the Impella on the left ventricular function after acute broad anterior wall ST elevation myocardial infarctions with cardiogenic shock: cardiovascular magnetic resonance imaging strain analysis

CMRI strain parameters

Impella

(n = 7)

Non-Impella

(n = 18)

P value

LVEF (%)

45 ± 13

34 ± 7.6

0.034

LVEDV (mL)

149 ± 29

187 ± 41

0.006

LVESV (mL)

80 ± 29

121 ± 40

0.012

LV Mass (g)

80 ± 13

96 ± 22

0.047

Infarcted size (% of LV myocardial mass)

29 ± 13

31 ± 11

0.97

LV longitudinal

Global

 Peak strain (%)

− 9.3 ± 2.0

− 8.1 ± 2.1

0.43

  Systolic strain rate (1/s)

− 0.8 ± 0.2

− 0.4 ± 0.4

0.020

  Diastolic strain rate (1/s)

0.7 ± 0.2

0.4 ± 0.3

0.12

Infarcted area

 Peak strain (%)

− 6.6 ± 2.3

− 5.9 ± 3.2

0.76

  Systolic strain rate (1/s)

− 0.5 ± 0.4

− 0.3 ± 0.4

0.29

  Diastolic strain rate (1/s)

0.3 ± 0.3

0.3 ± 0.3

0.81

Non-infarcted area

 Peak strain (%)

− 13 ± 3.0

− 11 ± 3.5

0.32

  Systolic strain rate (1/s)

− 1.2 ± 0.5

− 0.6 ± 0.7

0.12

  Diastolic strain rate (1/s)

1.2 ± 0.4

0.6 ± 0.5

0.024

LV radial

Global

 Peak strain (%)

23 ± 9.1

15 ± 4.9

0.044

  Systolic strain rate (1/s)

1.4 ± 0.8

0.8 ± 0.3

0.024

  Diastolic strain rate (1/s)

− 1.3 ± 0.5

− 0.7 ± 0.3

0.006

Infarcted area

 Peak strain (%)

19 ± 10

12 ± 5.8

0.12

  Systolic strain rate (1/s)

1.2 ± 0.8

0.6 ± 0.4

0.052

  Diastolic strain rate (1/s)

− 0.9 ± 0.6

− 0.4 ± 0.5

0.074

Non-infarcted area

 Peak strain (%)

27 ± 8.2

18 ± 6.3

0.020

  Systolic strain rate (1/s)

1.7 ± 0.7

1.1 ± 0.4

0.024

  Diastolic strain rate (1/s)

− 1.9 ± 0.4

− 1.0 ± 0.3

< 0.001

LV circumferential

Global

 Peak strain (%)

− 13 ± 4.4

− 9.5 ± 3.1

0.024

  Systolic strain rate (1/s)

− 0.9 ± 0.4

− 0.6 ± 0.2

0.044

  Diastolic strain rate (1/s)

0.8 ± 0.2

0.4 ± 0.2

0.001

Infarcted area

 Peak strain (%)

− 12 ± 5.5

− 7.8 ± 4.1

0.16

  Systolic strain rate (1/s)

− 0.8 ± 0.4

− 0.4 ± 0.5

0.10

  Diastolic strain rate (1/s)

0.6 ± 0.3

0.2 ± 0.3

0.024

Non-infarcted area

 Peak strain (%)

− 16 ± 3.0

− 12 ± 3.2

0.010

  Systolic strain rate (1/s)

− 1.1 ± 0.4

− 0.7 ± 0.2

0.030

  Diastolic strain rate (1/s)

1.0 ± 0.1

0.6 ± 0.2

< 0.001

  1. CMRI cardiac magnetic resonance image, LV left ventricular, LVEF left ventricular ejection fraction, LVEDV left ventricular end-diastole volume, LVESV left ventricular end-systolic volume
  2. P values are determined by a Mann–Whitney U test