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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.