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 4 Synchrony time index

Imaging plane variable	Units	Awake [mean ± SD]	Anesthetized [mean ± SD]	95% CI for difference of means	p value
LAX
STI_εL	ms	90.28 ± 14.23	97.98 ± 19.06	−19.46 to 2.97	0.141
SAX-AP
STI_εC	ms	93.08 ± 31.41	81.18 ± 33.65	−6.37 to 30.16	0.190
STI_εR	ms	58.83 ± 36.53	73.42 ± 52.91	−47.87 to 17.59	0.345
SAX-PM
STI_εC	ms	81.89 ± 25.97	86.20 ± 30.04	−18.36 to 9.75	0.531
STI_εR	ms	50.55 ± 22.37	50.14 ± 27.41	−16.33 to 16.00	0.983
SAX-CH
STI_εC	ms	93.06 ± 32.40	91.17 ± 32.78	−19.40 to 23.52	0.847
STI_εR	ms	64.32 ± 47.00	57.27 ± 42.52	−19.08 to 42.98	0.431

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; STI_εL, Synchrony time index based on longitudinal peak strain; STI_εC, Synchrony time index based on circumferential peak strain; STI_εR, Synchrony time index based on radial peak strain.

ISSN: 1476-7120