Cardiovascular magnetic resonance myocardial feature tracking detects quantitative wall motion during dobutamine stress

Table 4 Intra- and inter-observer variability of different strain parameters

Parameter	Ventricle	Variability	Mean	CI (95%)	p-value
Ecc _SAX	LV	Intra-observer	24.1	22.3-25.8	0.06
			22.7	20.8-24.6
		Inter-observer	24.1	22.3-25.8	0.61
			24.6	22.6-26.6
Err _SAX	LV	Intra-observer	19.6	15.8-23.4	0.86
			19.9	16.5-23.2
		Inter-observer	19.6	15.8-23.4	0.06
			25.4	22.3-28.4
Err _LAX	LV	Intra-observer	15.3	12.7-18	1
			15.3	13-17.7
		Inter-observer	15.3	12.7-18	0.32
			16.6	14.4-18.7
Ell _LV	LV	Intra-observer	15.9	13.2-18.6	0.57
			15.2	12.4-18.1
		Inter-observer	15.9	13.2-18.6	0.82
			16.2	13.2-19.1
Ell _RV	RV	Intra-observer	19.6	16-23.3	0.13
			16.8	13.4-20.1
		Inter-observer	19.6	16-23.3	0.32
			21.4	17.8-25

The table shows intra- and inter-observer variability of different strain parameters. 95% Confidence Intervalls of the difference and p-values are given to accurately determine individual variabilities [12]. Ecc_SAX = left ventricular short-axis circumferential strain, Err_SAX = left ventricular short-axis radial strain, Err_LAX = left ventricular long-axis radial strain, Ell_LV = left ventricular longitudinal strain, Ell_RV = right ventricular longitudinal strain, LV = left ventricle, RV = right ventricle.

ISSN: 1532-429X