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Table 1 Agreement between manually measured and automatically determined time of aortic valve closure and corresponding heart rates

From: The use of strain, strain rate, and displacement by 2D speckle tracking for assessment of systolic left ventricular function in goats: applicability and influence of general anesthesia

View

Treatment

tAVC m (ms) [mean ± SD]

tAVC a (ms) [mean ± SD]

Bias (ms)

95% LoA (ms)

95% CI for difference of means (ms)

p value

HR AVCm (min −1 ) [mean ± SD]

HR AVCa (min −1 ) [mean ± SD]

95% CI for difference of means (min −1 )

p value

 

Awake

281.6 ± 23.5

     

98 ± 19.6

   
 

Anesthetized

335.8 ± 24.4

     

85 ± 11.1

   

LAX

Awake

 

285.68 ± 27.57

−4

−33 to +25

−10.53 to 2.24

0.192

 

95 ± 20.39

−1.1 to +6.6

0.157

LAX

Anesthetized

 

331.11 ± 22.9

+6

−30 to +43

−2.38 to 14.60

0.149

 

84 ± 10.46

−0.3 to +1.3

0.186

SAX-AP

Awake

 

274.59 ± 30.36

+5

−22 to +32

−1.11 to 11.17

0.103

 

99 ± 21.92

−4.1 to +3.3

0.812

SAX-AP

Anesthetized

 

323.97 ± 24.18

+12

−31 to +55

2.07 to 21.66

0.020

 

85 ± 10.97

−0.8 to +0.7

0.960

SAX-PM

Awake

 

284.79 ± 31.13

−4

−50 to +41

−14.33 to 5.75

0.385

 

97 ± 23.46

−4.7 to +5.8

0.823

SAX-PM

Anesthetized

 

330.78 ± 18.89

+5

−34 to +44

−3.85 to 13.95

0.251

 

85 ± 11.02

−0.5 to +0.8

0.625

SAX-CH

Awake

 

311.14 ± 24.26

−30

−66 to +7

−38.11 to −21.55

<0.0001

 

96 ± 19.71

−1.9 to +6.4

0.277

SAX-CH

Anesthetized

 

346.41 ± 25.35

−11

−52 to +31

−20.04 to −1.109

0.030

 

85 ± 10.83

−1.0 to +0.8

0.825

  1. LAX, long axis view; SAX-AP, short axis view at apical level; SAX-PM, short axis view at papillary muscle level; SAX-CH, short axis view at chordal level; tAVCm, manually measured time of aortic valve closure based on M-mode recordings of aortic valve motion; tAVCa, automatically determined time of aortic valve closure based on 2DST-based strain analyses; HRAVCm, heart rate derived from cardiac cycles used for measurement of tAVCm; HRAVCa, heart rate derived from cardiac cycles used for measurement of tAVCa; LoA, limits of agreement; CI, confidence interval.