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Table 3 The response in strain parameters to 10 and 20 μg · kg-1· min-1 of dobutamine on a segmental basis

From: Cardiovascular magnetic resonance myocardial feature tracking detects quantitative wall motion during dobutamine stress

Parameter

Level of Dobutamine (μg/kg-1/min-1)

Significance: Paired t-test

 

Rest

10

20

Rest-10

Rest-20

10-20

Err SAX Average

19.6 ± 14.6

31.8 ± 20.9

42.4 ± 25.5

<0.05

<0.05

<0.05

Err SAX Segment 7

27.3 ± 16

33.1 ± 20

50.2 ± 29

0.4

<0.05

0.1

Err SAX Segment 8

13 ± 9.5

22.6 ± 11.5

28.2 ± 15.2

<0.05

<0.05

0.2

Err SAX Segment 9

11.1 ± 9.9

17.6 ± 13.4

22 ± 17

0.08

<0.05

0.3

Err SAX Segment 10

16.8 ± 12

31.7 ± 20.3

37.2 ± 19.2

<0.05

<0.05

0.22

Err SAX Segment 11

21.6 ± 15.9

42.7 ± 20

55.8 ± 19.1

<0.05

<0.05

<0.05

Err SAX Segment 12

27.7 ± 16.1

43.4 ± 26.6

60.7 ± 28.1

0.1

<0.05

0.18

Ecc SAX Average

-24.1 ± 6.7

-32.7 ± 11.4

-39.2 ± 15.2

<0.05

<0.05

<0.05

Ecc SAX Segment 7

-21.7 ± 6.9

-24.2 ± 6.3

-28.9 ± 16

0.29

0.2

0.2

Ecc SAX Segment 8

-20.2 ± 8.2

-25.9 ± 12.4

-33.9 ± 18

0.06

<0.05

0.09

Ecc SAX Segment 9

-22.8 ± 6.9

-35.7 ± 9

-42.1 ± 9.8

<0.05

<0.05

0.1

Ecc SAX Segment 10

-26.7 ± 5.5

-36.6 ± 8.8

-38.8 ± 16.3

0.09

0.06

0.55

Ecc SAX Segment 11

-29.1 ± 4.7

-38.1 ± 13.2

-47 ± 9.5

<0.05

<0.05

0.09

Ecc SAX Segment 12

-23.8 ± 4.3

-35.9 ± 10.9

-44.2 ± 14.9

0.09

<0.05

0.06

  1. The table shows the response in strain parameters to 10 and 20 μg · kg-1· min-1 of dobutamine on a segmental basis derived from mid-ventricular short-axis view containing both papillary muscles. Values are expressed as mean ± standard deviation. Paired t-test was used to determine the significance of change from one level of dobutamine to the next one (p < 0.05). Err SAX = left ventricular short-axis radial strain; Ecc SAX = left ventricular short-axis circumferential strain
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Journal of Cardiovascular Magnetic Resonance

ISSN: 1532-429X

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