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Table 2 The hemodynamic response and the response in strain parameters to 10 and 20 μg · kg-1· min-1 of dobutamine

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

Heart Rate (bpm)

68.6 ± 11.9

87.1 ± 15.5

115.7 ± 11.1

<0.05

<0.05

<0.05

Mean BP (mmHg)

91.5 ± 10.2

98.6 ± 10.4

102.9 ± 10.7

<0.05

<0.05

<0.05

LV-CI (l/min/m 2 )

3.0 ± 0.6

4.8 ± 0.8

5.7 ± 0.8

<0.05

<0.05

<0.05

RV-CI (l/min/m 2 )

3.0 ± 0.6

4.7 ± 0.8

5.8 ± 4.0

<0.05

<0.05

<0.05

LV-EDV (ml/m 2 )

76.9 ± 12.5

75.0 ± 12.5

64.5 ± 11.5

0.25

<0.05

<0.05

LV-ESV (ml/m 2 )

33.4 ± 7.5

22.1 ± 7.3

15.2 ± 5.0

<0.05

<0.05

<0.05

LV-SV (ml/m 2 )

43.5 ± 6.5

52.9 ± 10.6

49.3 ± 8.0

<0.05

<0.05

0.06

LV-EF (%)

56.9 ± 4.4

70.7 ± 8.1

76.8 ± 4.6

<0.05

<0.05

<0.05

Err SAX

19.6 ± 14.6

31.8 ± 20.9

42.4 ± 25.5

<0.05

<0.05

<0.05

Ecc SAX

-24.1 ± 6.7

-32.7 ± 11.4

-39.2 ± 15.2

<0.05

<0.05

<0.05

  1. The table shows the hemodynamic response and the response in strain parameters to 10 and 20 μg · kg-1· min-1 of dobutamine. Volumetric values were indexed for body surface area and expressed as mean ± standard deviation. Paired t-test was used to determine the significance of change from one level of dobutamine to next (p < 0.05). LV = left ventricle SV = stroke volume ESV = end-systolic volume EDV = end-diastolic volume, EF = ventricular ejection fraction, 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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