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

Table 3 Comparison between averaged peak strain and averaged peak systolic strain

Direction of strain	Imaging plane	Treatment	Peak strain, ε (%) [mean ± SD]	Peak systolic strain, ε _sys (%) [mean ± SD]	95% CI for difference of means	p value
Longitudinal	LAX	Awake	−27.44 ± 2.22	−26.17 ± 2.23	−1.56 to −0.98	<0.001
		Anesthetized	−28.65 ± 2.21	−27.17 ± 2.49	−1.91 to −1.06	<0.001
Circumferential	SAX-AP	Awake	−23.22 ± 2.17	−22.80 ± 2.45	−0.67 to 0.05	0.087
		Anesthetized	−25.58 ± 3.11	−25.10 ± 3.21	−0.71 to −0.26	<0.001
	SAX-PM	Awake	−22.98 ± 2.87	−22.35 ± 2.97	−0.89 to −0.37	<0.001
		Anesthetized	−24.64 ± 2.92	−23.96 ± 3.23	−1.01 to −0.35	<0.001
	SAX-CH	Awake	−22.12 ± 3.05	−14.19 ± 1.94	−8.78 to −7.09	<0.001
		Anesthetized	−25.43 ± 3.03	−24.84 ± 3.24	−0.76 to −0.40	<0.001
Radial	SAX-AP	Awake	58.58 ± 7.97	55.24 ± 8.94	2.31 to 4.36	<0.001
		Anesthetized	58.41 ± 11.65	55.59 ± 12.65	1.96 to 3.67	<0.001
	SAX-PM	Awake	58.44 ± 9.21	55.26 ± 9.59	2.31 to 4.02	<0.001
		Anesthetized	63.92 ± 15.25	61.86 ± 15.67	1.25 to 2.88	<0.001
	SAX-CH	Awake	57.71 ± 10.31	53.90 ± 9.62	2.75 to 4.86	<0.001
		Anesthetized	63.36 ± 12.53	59.80 ± 12.88	2.50 to 4.62	<0.001

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.

ISSN: 1476-7120